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Report

Evaluation of Sound Transit Train Stations and Transit-Oriented Development Areas for Common Carrier Locker Systems (Executive Summary)

 
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Publication Date: 2018
Summary:

The rapid expansion of ecommerce has flooded American cities with delivery trucks, just as those cities are experiencing booming population growth. Retailers need a more efficient, reliable, and cost-effective way to deliver goods in increasingly crowded urban environments. For their part, cities like Seattle want to minimize traffic congestion, both sustain quality of life for residents and ensure a smooth flow of goods and services.

Common carrier parcel lockers hold tremendous potential for streamlining the urban goods delivery system and addressing these challenges. This research study explores the viability of providing public right of way for common carrier lockers at or near transit stations in Seattle, a ground-breaking step toward improving freight delivery in the city’s fast-growing urban core.

Recommended Citation:
Supply Chain Transportation & Logistics Center. (2018) Evaluation of Sound Transit Train Stations and Transit Oriented Development Areas for Common Carrier Locker Systems (Executive Summary)
Article

Where’s My Package? Common Carrier Freight Lockers Can Ease City Traffic and Prevent Failed Deliveries

Publication: The Conversation
Publication Date: 2018
Summary:

Online shopping is a big convenience for many Americans, but porch piracy can ruin the experience. For example, Mikaela Gilbert lived in a row house in West Philadelphia while she studied systems engineering at the University of Pennsylvania. By her junior year, Gilbert had lost enough packages to thieves that she devised an elaborate three-pronged security strategy.

Her first line of defense was having online purchases shipped to a friend who lived in a high-rise apartment where a doorman secured incoming packages. She also sent orders to her parents’ house in New Jersey when she had a visit home planned. But both of those options were hugely inconvenient, so sometimes she routed deliveries to her place after texting her seven housemates to be on the lookout.

When Amazon installed branded delivery lockers near the center of campus, Gilbert began receiving packages there, which was less stressful than managing a small army of collaborators. But it limited her shopping to just one retailer. When Amazon didn’t have something she wanted, she had to fall back on her circle of friends.

Retailers delivering to a customers’ homes also want to avoid these situations. Research at our lab has identified a promising alternative: publicly accessible common carrier freight lockers where all retailers can leave packages for pickup.

So many stops, so little time
Like Amazon’s branded lockers, common carrier lockers are automated, self-service storage units that provide a secure location for customers to receive online purchases. However, any retailer or delivery firm can access them. Some private buildings have such lockers now, but those are only open to residents. Our study examined the effectiveness of locating them in public spaces in dense urban areas, where they can be available to everyone.

The University of Washington’s Urban Freight Lab is a structured research work group composed of leading retail, logistics and delivery firms. We partner with the Seattle Department of Transportation, collect and analyze data, and run pilot tests of promising solutions in Seattle’s Center City area. Our focus is on solving urban delivery issues in an age when e-commerce is exploding, city populations are expanding, and gridlock is reaching epic levels.

In its first report, published in early 2018, the Lab analyzed the “Final 50 Feet” of the urban goods delivery system – the last leg of the supply chain. It begins when trucks pull into a parking space and stop moving, whether at the curb, in an alley, or at a building’s loading dock or internal freight bay. From there, it follows delivery people inside urban towers, ending where customers receive their packages.

Researchers discovered two especially thorny challenges in this segment of the chain: extended “dwell time,” when trucks are parked in load/unload spaces too long, and failed first delivery attempts due to causes that include porch piracy. Solving these puzzles could reduce delivery costs, traffic congestion and crime rates, and improve online shoppers’ experiences.

Delivering packages one at a time to individual homes or offices is time-consuming and requires driving to multiple locations and parking in multiple spaces. It also results in failed first delivery rates of up to 15 percent in parts of some cities, according to some of our lab’s member companies. Instead, we decided to try creating delivery density in a single location right where the trucks unloaded.

Centralized lockers where people live and work
Accordingly, the Urban Freight Lab’s second research project pilot-tested placing a common carrier locker system in the 62-floor Seattle Municipal Tower in downtown Seattle’s financial district. This step cut the time required to make deliveries in the tower by 78 percent. The next question was where to locate more of these delivery density points, or “mini-distribution nodes,” as the study called them.

Amazon, which is headquartered in Seattle, had already approached regional transportation agency Sound Transit about locating its branded lockers at the agency’s Link light rail stations. But public stewards of the property – the Seattle Department of Transportation, Sound Transit and King County Metro – did not want to advantage one carrier or retailer over others. Instead, we suggested locating common carrier lockers.

The transit agencies saw that this could reduce delivery truck traffic in neighborhoods they served, easing congestion and reducing vehicle emissions. And their mobility hub policies aimed to create lively public spaces that offered not only multiple transportation modes but lots of convenient amenities.

In a survey of 185 riders at three transit stations, our lab’s third research study found strong interest in the lockers, with up to 67 percent of respondents at each station willing to use them and the vast majority willing to carry a package three to six blocks to do so. These responses, plus the fact that some 137,000 people lived within a 30-minute walk of the three stations, suggested that tens of thousands of Seattle residents would be willing to use common carrier lockers at those stations.

For retailers like Nordstrom, the lockers represent a potential solution to porch piracy and other glitches associated with online shopping. “Rather than leaving the package at a door, some carriers want customers to come to their location to collect the package, while others might redeliver,” Loren VandenBerghe, director of transportation for Nordstrom, told us. “Whatever the process, the customer has to track down the package. Instead, we’d prefer to get the package in our customer’s hands when they expect it.”

Researchers have developed criteria for selecting locker locations and chosen five possible sites at or near the transit stations for pilot testing. We have received funding from the U.S. Department of Energy to expand use of common carriers lockers in public spaces to a larger area in Seattle’s dense urban core and start actively managing the load/unload space network with new technology. Delivery drivers will be able to pull right up to lockers and unload goods, and riders can pick up their packages when they hop on or off a bus – making it much more convenient than waiting for a truck and scanning the street for porch pirates.

Recommended Citation:
Goodchild, A. (2018, December 18). Where’s my package? Common carrier freight lockers can ease city traffic and prevent failed deliveries. The Conversation. https://theconversation.com/wheres-my-package-common-carrier-freight-lockers-can-ease-city-traffic-and-prevent-failed-deliveries-108455
Article

How Many Amazon Packages Get Delivered Each Year?

Publication: The Conversation
Publication Date: 2022
Summary:

How many Amazon packages get delivered each year? – Aya K., age 9, Illinois

It’s incredibly convenient to buy something online, right from your computer or phone. Whether it’s a high-end telescope or a resupply of toothpaste, the goods appear right at your doorstep. This kind of shopping is called “e-commerce” and it’s becoming more popular each year. In the U.S., it has grown from a mere 7% of retail purchases in 2012 to 19.6% of retail and $791.7 billion in sales in 2020.

Amazon’s growing reach
For Amazon, the biggest player in e-commerce, this means delivering lots of packages.

In 2021 Amazon shipped an estimated 7.7 billion packages globally, based on its nearly $470 billion in sales.

In 2021 Amazon shipped an estimated 7.7 billion packages globally.

If each of these packages were a 1-foot square box and they were stacked on top of one another, the pile would be six times higher than the distance from the Earth to the Moon. Laid end to end, they would wrap around the Earth 62 times.

Back in the early 2010s, most things bought from Amazon.com were shipped using a third-party carrier like FedEx or UPS. In 2014, however, Amazon began delivering packages itself with a service called “Fulfilled by Amazon.” That’s when those signature blue delivery vans started appearing on local streets.

Since then, Amazon’s logistics arm has grown from relying entirely on other carriers to shipping 22% of all packages in the U.S. in 2021. This is greater than FedEx’s 19% market share and within striking distance of UPS’s 24%. Amazon’s multichannel fulfillment service allows other websites to use its warehousing and shipping services. So your order from Etsy or eBay could also be packed and shipped by Amazon.

The supply chain
To handle that many packages, shipping companies need an extensive network of manufacturers, vehicles and warehouses that can coordinate together. This is called the supply chain. If you’ve ever used a tracking number to follow a package, you’ve seen it in action.

People who make decisions about where to send vehicles and how to route packages are constantly trying to keep costs down while still getting packages to customers on time. The supply chain can do this very effectively, but it also has downsides.

More delivery vehicles on the road produce more greenhouse gas emissions that contribute to climate change, along with pollutants like nitrogen oxides and particulate matter that are hazardous to breathe. Traffic congestion is also a major concern in cities as delivery drivers try to find parking on busy streets.

Urban freight solutions
Are there ways to balance the increasing number of deliveries while making freight safe, sustainable and fast? At the University of Washington’s Urban Freight Lab, we work with companies like Amazon and UPS and others in the shipping, transportation and real estate sectors to answer questions like this. Here are some solutions for what we and our colleagues call the “last mile” – the last leg of a package’s long journey to your doorstep.

  • Electrification: Transitioning from gasoline and diesel vehicles to fleets of electric or other zero-emission vehicles reduces pollution from delivery trucks. Tax credits and local policies, such as creating so-called green loading zones and zero-emission zones for clean vehicles, create incentives for companies to make the switch.
  • Common carrier lockers: Buildings can install lockers at central locations, such as busy transit stops, so that drivers can drop off packages without going all the way to your doorstep. When you’re ready to pick up your items, you just stop by at a time that’s convenient for you. This reduces both delivery truck mileage and the risk of packages being stolen off of porches.
  • Cargo bicycles: Companies can take the delivery truck out of the equation and use electric cargo bicycles to drop off smaller packages. In addition to being zero-emission, cargo bicycles are relatively inexpensive and easy to park, and they provide a healthier alternative for delivery workers.

To learn more about supply chains and delivery logistics, check with your town or city’s transportation department to see if they are testing or already have goods delivery programs or policies, like those in New York and Seattle. And the next time you order something for delivery, consider your options for receiving it, such as walking or biking to a package locker or pickup point, or consolidating your items into a single delivery.

Package delivery can be both convenient and sustainable if companies keep evolving their supply chains, and everyone thinks about how they want delivery to work in their neighborhoods.

Recommended Citation:
Goodchild, A. How many Amazon packages get delivered each year? The Conversation. https://theconversation.com/how-many-amazon-packages-get-delivered-each-year-187587
Chapter

Success Factors for Urban Logistics Pilot Studies

Publication: The Routledge Handbook of Urban Logistics
Publication Date: 2023
Summary:

The last mile of delivery is undergoing major changes, experiencing new demand and new challenges. The rise in urban deliveries amid the societal impacts of the COVID-19 pandemic has dramatically affected urban logistics. The level of understanding is increasing as cities and companies pilot strategies that pave the way for efficient urban freight practices. Parcel lockers, for instance, have been shown to reduce delivery dwell times with such success that Denmark increased its pilot program of 2,000 lockers to 10,000 over the past two years. This chapter focuses on challenges faced during those pilots from technical, managerial and operational perspectives, and offers examples and lessons learned for those who are planning to design and/or run future pilot tests. On-site management proved to be critical for locker operations.

Recommended Citation:
Ranjbari, Andisheh & Goodchild, A & Guzy, E. (2023). Success Factors for Urban Logistics Pilot Studies. 10.4324/9781003241478-27.

The Final 50 Feet of the Urban Goods Delivery System: Pilot Test of an Innovative Improvement Strategy

Background

We are living at the convergence of the rise of e-commerce and fast growing cities. Surging growth in U.S. online sales has averaged more than 15% year-over-year since 2010. Total e-commerce sales for 2016 were estimated at $394.9 billion, an increase of 15.1 percent from 2015. This is a huge gain when compared to total retail sales in 2016, which only increased 2.9 percent from 2015. E-commerce sales in 2016 accounted for 8.1 percent of total sales, while accounting for 7.3 percent of total sales in 2015.

This is causing tremendous pressure on local governments to rethink the way they manage street curb parking and alley operations for trucks and other delivery vehicles, and on building operators to plan for the influx of online goods. City managers and policy makers are grappling with high demand for scarce road, curb and sidewalk space, and multiple competing uses. But rapidly growing cities lack data-based evidence for the strategies they are considering to support e-commerce and business vitality, while managing limited parking in street space that is also needed for transit, pedestrians, cars, bikes and trucks.

The Final 50 Feet is the project’s shorthand designation for the last leg of the delivery process, which:

  • Begins when a truck stops at a city-owned Commercial Vehicle Load Zone or alley, or in a privately-owned freight bay or loading dock in a building;
  • May extend along sidewalks or through traffic lanes; and
  • Ends where the end customer takes receipt of delivery.

Research Project

The purpose of the research project is to pilot test a promising strategy to reduce the number of failed first delivery attempts in urban buildings. The test will take place in the Seattle Municipal Tower. It will serve as a case study for transportation and urban planning professionals seeking to reduce truck trips to urban buildings. Urban Freight Lab identified two promising strategies for the pilot test:

  • Locker system: smaller to medium sized deliveries can be placed into a locker which will be temporarily installed during our pilot test
  • Grouped-tenant-floor-drop-off-points for medium sized items if locker is too small or full (4-6 floor groups to be set up by SDOT and Seattle City Light)
  • People will come and pick up the goods at the designated drop off points
  • Flyers with information of drop-off-points will be given to the carriers

UFL will evaluate the ability of the standardized second step pilot test to reduce the number of failed first delivery attempts by:

  • Collecting original data to document the number of failed first delivery attempts before and after the pilot test; and
  • Comparing them to the pilot test goals.

The Final 50 Feet: Common Carrier Locker Pilot Test at Seattle Municipal Tower (Part of Task Order 2)

As part of the Final 50 Feet Research Program, the Urban Freight Lab engaged multiple partners and funding sources to successfully pilot test a common carrier locker system (open to all retail and multiple delivery firms) that created delivery density in the Seattle Municipal Tower.

The pilot tested the ability of new mini-distribution centers such as smart lockers to create delivery density and reduce the time delivery people have to spend in urban towers to complete the work. The Lab collected “before” and “after” data to evaluate the pilot’s premise: that when delivery trucks can pull into a load/unload space that’s close to a mini-distribution node with delivery density (lots of deliveries in one place), everyone benefits. Lab members UPS and the U.S. Postal Service participated in this pilot, so any package they delivered to the building went into the locker system. The pilot was open to the first 100 Municipal Tower tenants who signed up to use the lockers from March to April 2018.

This pilot reduced the average amount of time parcel delivery personnel spent doing their work in the 62-floor office tower by 78%, when compared with going floor-to-floor, door-to-door in the tower. It demonstrates the UFL’s unique capability to develop cross-functional business and city working partnerships, gain senior executives’ participation in research, and effectively manage innovative and complex projects that have a high level of uncertainty. This pilot provides evidence that the common carrier locker system strategy can achieve a significant reduction in delivery time.

Presentation

Growth of Ecommerce and Ride-Hailing Services is Reshaping Cities Connecting State and City DOTs, and Transit Agencies for Innovative Solutions

 
Publication: AASHTO 2018 Joint Policy Conference: Connecting the DOTs
Volume: 19-Jul-18
Publication Date: 2018
Summary:

There is not enough curb capacity, now.

A recent curb parking utilization study in the City of Seattle indicated 90% or higher occupancy rates in Commercial Vehicle Load Zones (CVLZs) for some areas for much of the workday.

The Final Fifty Feet is a new research field.

The Final 50 Feet project is the first time that researchers have analyzed both the street network and cities’ vertical space as one unified goods delivery system. It focuses on:

  • The use of scarce curb, buildings’ internal loading bays, and alley space
  • How delivery people move with handcarts through intersections and sidewalks; and
  • On the delivery processes inside urban towers.
Authors: Barbara Ivanov
Paper

Do Parcel Lockers Reduce Delivery Times? Evidence from the Field

 
Download PDF  (1.61 MB)
Publication: Transportation Research Part E: Logistics and Transportation Review
Volume: 172 (2023)
Publication Date: 2023
Summary:

Common carrier parcel lockers have emerged as a secure, automated, self-service means of delivery consolidation in congested urban areas, which are believed to mitigate last-mile delivery challenges by reducing out-of-vehicle delivery times and consequently vehicle dwell times at the curb. However, little research exists to empirically demonstrate the environmental and efficiency gains from this technology. In this study, we designed a nonequivalent group pre-test/post-test control experiment to estimate the causal effects of a parcel locker on delivery times in a residential building in downtown Seattle. The causal effects are measured in terms of vehicle dwell time and the time delivery couriers spend inside the building, through the difference-in-difference method and using a similar nearby residential building as a control. The results showed a statistically significant decrease in time spent inside the building and a small yet insignificant reduction in delivery vehicle dwell time at the curb. The locker was also well received by the building managers and residents.

Recommended Citation:
Ranjbari, A., Diehl, C., Dalla Chiara, G., & Goodchild, A. (2023). Do Commercial Vehicles Cruise for Parking? Empirical Evidence from Seattle. Transportation Research Part E: Logistics and Transportation Review, 172, 103070. https://doi.org/10.1016/j.tre.2023.103070 
Report

Final Report: Technology Integration to Gain Commercial Efficiency for the Urban Goods Delivery System, Meet Future Demand for City Passenger and Delivery Load/Unload Spaces, and Reduce Energy Consumption

 
Download PDF  (7.07 MB)
Publication Date: 2022
Summary:

This three-year project supported by the U.S. Department of Energy Vehicle Technologies Office has the potential to radically improve the urban freight system in ways that help both the public and private sectors. Working from 2018-2021, project researchers at the University of Washington’s Urban Freight Lab and collaborators at the Pacific Northwest National Laboratory have produced key data, tested technologies in complex urban settings, developed a prototype parking availability app, and helped close major knowledge gaps.

All the fruits of this project can be harnessed to help cities better understand, support and actively manage truck load/unload operations and their urban freight transport infrastructure. Project learnings and tools can be used to help make goods delivery firms more efficient by reducing miles traveled and the time it takes to complete deliveries, benefitting businesses and residents who rely on the urban freight system for supplies of goods. And, ultimately, these project learnings and tools can be used to make cities more livable by minimizing wasted travel, which, in turn, contributes to reductions in fuel consumption and emissions.

Cities today are challenged to effectively and efficiently manage their infrastructure to absorb the impacts of ever-increasing e-commerce-fueled delivery demand. All delivery trucks need to park somewhere to unload and load. Yet today’s delivery drivers have no visibility on available parking until they arrive at a site, which may be full. That means they can wind up cruising for parking, which wastes time and fuel and contributes to congestion. Once drivers do find parking, the faster they can unload at the spot, the faster they free up space for other drivers, helping others avoid circling for parking. This makes the parking space—and thus the greater load/unload network—more productive.

To this end, the research team successfully met the project’s three goals, developing and piloting strategies and technologies to:

  • Reduce parking-seeking behavior in the study area by 20%
  • Reduce parcel truck dwell time (the time a truck spends in a spot to load/unload) in the study area by 30%
  • Increase curb space, alley space, and private loading bay occupancy rates in the study area

The research team met these goals by creating and piloting on Seattle streets OpenPark, a first-of-its-kind real-time and forecasting curb parking app customized for commercial delivery drivers—giving drivers the “missing link” in their commonly used routing tools that tell them how best to get to delivery locations, but not what parking is available to use when they get there. Installing in-ground sensors on commercial vehicle load zones (CVLZs) and passenger load zones (PLZs) in the 10-block study area in Seattle’s downtown neighborhood of Belltown let researchers glean real-time curb parking data. The research team also met project goals by piloting three parcel lockers in public and private spaces open to any delivery carrier, creating a consolidated delivery hub that lets drivers complete deliveries faster and spend less time parked. Researchers collected and analyzed data to produce the first empirical, robust, statistically significant results as to the impact of the lockers, and app, on on-the-ground operations. In addition to collecting and analyzing sensor and other real-time and historical data, researchers rode along with delivery drivers to confirm real-world routing and parking behavior. Researchers also surveyed building managers on their private loading bay operations to understand how to boost usage.

Key findings that provide needed context for piloting promising urban delivery solutions:

  • After developing a novel model using GPS data to measure parking-seeking behavior, researchers were able to quantify that, on average, a delivery driver spends 28% of travel time searching for parking, totaling on average one hour per day for a parcel delivery driver. This project offers the first empirical proof of delivery drivers’ cruising for parking.
  • While many working models to date have assumed that urban delivery drivers always choose to double-park (unauthorized parking in the travel lane), this study found that behavior is rare: Double parking happened less than 5% of the times drivers parked.
  • That said, drivers do not always park where they are supposed to. The research team found that CVLZ parking took place approximately 50% of the time. The remaining 50% included mostly parking in “unauthorized” curb spaces, including no-parking zones, bus zones, entrances/exits of parking garages, etc.
  • Researcher ride-alongs with delivery drivers revealed parking behaviors other than unauthorized parking that waste valuable time and fuel: re-routing (after failing to find a desired space, giving up and doubling back to the delivery destination later in the day) and queuing (temporarily parking in an alternate location and waiting until the desired space becomes available).
  • Some 13% of all parking events in CVLZ spaces were estimated as overstays; the figure was 80% of all parking events in PLZ spaces. So, the curb is not being used efficiently or as the city intended as many parking events exceed the posted time limit.
  • Meantime, there is unused off-street capacity that could be tapped in Seattle’s Central Business District. Estimates show private loading bays could increase area parking capacity for commercial vehicles by at least 50%. But surveys show reported use of loading bays is low and property managers have little incentive to maximize it. Property managers find curb loading zones more convenient; it seems delivery drivers do, too, as they choose to park at the curb even when loading bay space is available.

Key findings from the technology and strategies employed:

Carriers give commercial drivers routing tools that optimize delivery routes by considering travel distance and (often) traffic patterns—but not details on parking availability. Limited parking availability can lead to significant driver delays through cruising for parking or rerouting, and today’s drivers are largely left on their own to assess and manage their parking situation as they pull up to deliver.

The project team worked closely with the City of Seattle to obtain permission to install parking sensors in the roadway and communications equipment to relay sensor data to project servers. The team also developed a fully functional and open application that offers both real-time parking availability and near-time prediction of parking availability, letting drivers pick forecasts 5, 15, or 30 minutes into the future depending on when the driver expects to arrive at the delivery destination. Drivers can also enter their vehicle length to customize availability information.

After developing, modeling, and piloting the real-time and forecasting parking app, researchers conducted an experiment to determine how use of the app impacted driver behavior and transportation outcomes. They found that:

  • Having access to parking availability via the app resulted in a 28% decrease in the time drivers spent cruising for parking. Exceeding our initial goal of reducing parking seeking behavior by 20%. In the study experiment, all drivers had the same 20-foot delivery van and the same number of randomly sampled delivery addresses in the study area. But some drivers had access to the app; others did not.
  • Preliminary results based on historic routing data show that the use of such a real-time curb parking information and prediction app can reduce route time by approximately 1.5%. An analysis collected historic parking occupancy and cruising information and integrated it into a model that was then used to revise scheduling and routing. This model optimally routed vehicles to minimize total driving and cruising time. However, since the urban environment is complex and consists of many random elements, results based on historic data underly a high amount of randomness. Analysis on synthetic routes suggests including parking availability in routing systems is especially promising for routes with high delivery density and with stops where the cruising time delays vary a lot along the planned time horizon; here, route time savings can reach approximately 20.4% — conditions outlined in the report.
  • The central tradeoff among four approaches to parking app architecture going forward is cost and accuracy. The research team found that it is possible to train machine learning models using only data from curb occupancy sensors and reach a higher than 90% accuracy. Training of state-space models (those using inputs such as time of day, day of the week, and location to predict future parking availability) is computationally inexpensive, but these models offer limited accuracy. In contrast, deep-learning models are highly accurate but computationally expensive and difficult to use on streaming data.

Common carrier lockers create delivery density, helping delivery people complete their work faster. The driver parks next to the locker system, loads packages into it, and returns to the truck. When delivery people spend less time going door-to-door (or floor-to-floor inside a building), it cuts the time their truck needs to be parked, increasing turnover and adding parking capacity in crowded cities. This project piloted and collected data on common carrier lockers in three study area buildings.

From piloting the common carrier parcel lockers, researchers found that:

  • The implementation of the parcel locker allowed delivery drivers to increase productivity: 40%-60% reduction in time spent in the building and 33% reduction in vehicle dwell time at the curb.
Authors: Dr. Anne GoodchildDr. Giacomo Dalla ChiaraFiete KruteinDr. Andisheh RanjbariDr. Ed McCormackElizabeth Guzy, Dr. Vinay Amatya (PNNL), Ms. Amelia Bleeker (PNNL), Dr. Milan Jain (PNNL)
Recommended Citation:
Urban Freight Lab (2022). Final Report: Technology Integration to Gain Commercial Efficiency for the Urban Goods Delivery System.
Paper

What is the Right Size for a Residential Building Parcel Locker?

 
Download PDF  (1.87 MB)
Publication: Transportation Research Record: Journal of the Transportation Research Board
Publication Date: 2022
Summary:

Common-carrier parcel lockers present a solution for decreasing delivery times, traffic congestion, and emissions in dense urban areas through consolidation of deliveries. Multi-story residential buildings with large numbers of residents, and thus a high volume of online package orders, are one of the best venues for installing parcel lockers. But what is the right size for a residential building locker that would suit the residents’ and building managers’ needs?

Because of the novelty of parcel lockers, there is no clear guideline for determining the right locker size and configuration for a residential building given the resident population. A small locker would result in packages exceeding capacity and being left in the lobby, increasing the building manager’s workload and confusing and inconveniencing users. On the other hand, a large locker is more expensive, more difficult to install, and unappealing to residents.

To answer this question, we installed a common-carrier parcel locker in a residential building in downtown Seattle, WA, U.S.A. Through collecting detailed data on locker usage from the locker provider company, we studied and quantified carriers’ delivery patterns and residents’ online shopping and package pickup behaviors. We then used this information to model the locker delivery and pickup process, and simulated several locker configurations to find the one that best suits the delivery needs of the building.

These findings could aid urban planners and building managers in choosing the right size for residential building lockers that meet delivery demand while minimizing costs and contributing to environmental benefits.

Recommended Citation:
Ranjbari, A., Diehl, C., Chiara, G. D., & Goodchild, A. (2022). What is the Right Size for a Residential Building Parcel Locker?. Transportation Research Record, 03611981221123807. https://doi.org/10.1177/03611981221123807