METRO Magazine Logo
MenuMENU
SearchSEARCH

Autonomous vehicles will clog cities unless lawmakers step up: Study

City and state governments can intervene to encourage higher sharing of AVs and avoid a significant move away from mass transit systems.

July 3, 2018
Autonomous vehicles will clog cities unless lawmakers step up: Study

Autonomous vehicles (AVs) will increase, not decrease, traffic in already overcrowded downtown areas.  Image: Texas A&M Transportation Institute

3 min to read


Autonomous vehicles (AVs) will increase, not decrease, traffic in already overcrowded downtown areas. Image: Texas A&M Transportation Institute

Autonomous vehicles (AVs) will increase, not decrease, traffic in already overcrowded downtown areas. That is one of the main findings of a joint World Economic Forum and Boston Consulting Group (BCG) study with the City of Boston, released today.

While AVs will reduce the numbers of cars and overall travel times across cities as a whole, the effect is not evenly distributed, with concentrated downtown areas potentially seeing a deterioration in traffic flow. City and state governments can intervene to encourage higher sharing of AVs and avoid a significant move away from mass transit systems, which remain essential for urban mobility.

Ad Loading...

“Cities can’t follow a ‘wait and see’ approach towards autonomous vehicles,” said John Moavenzadeh, member of the Executive Committee of the World Economic Forum and co-author of the study. “Cities need to actively explore policies and incentives, such as dynamic pricing, dedicated lanes and redesign of the kerb to ensure that autonomous vehicles will achieve the full value for society that they promise. If such choices are not made, cities risk losing more than they will gain from autonomous vehicles.”

A sophisticated traffic simulation model for the City of Boston showed that both the number of vehicles on the road and travel times would change markedly. While neighbourhoods outside the downtown core, such as Allston, would see a reduction in traffic and decreased travel time, travellers downtown would face increased traffic and travel time. The study also indicated that a shift to autonomous mobility would reduce by 48% the number of parking spaces required in Boston, which unlocks tremendous opportunities to rethink streets and overall urban design.

While autonomous vehicles will reduce the numbers of cars and overall travel times across cities as a whole, the effect is not evenly distributed, according to a new World Economic Forum study. Photo: METRO Magazine/J.Starcic

The team conducted a large-scale conjoint analysis asking thousands of residents in the Boston area what types of autonomous and non-autonomous vehicles they were likely to drive in certain situations (e.g., travelling to work when raining, etc.). The analysis predicts a clear shift to mobility-on-demand (both AVs like robo-shuttles and non-AVs like today’s taxi and ride-share services), which will account for 30% of all trips in the greater Boston area (up from 7% today) and 40% of trips within the city limits in the future. The results of this consumer study were used as the input assumptions for a traffic simulation model.

“Autonomous mobility on demand provides a very convenient door-to-door service with a guaranteed seat and convenient mobile booking – all this at very competitive prices,” said Nikolaus Lang, Senior Partner at BCG and co-author of the study. “For trips shorter than four miles, it is likely that travellers would opt for low-capacity autonomous taxis or shuttles rather than taking high-capacity mass transit options like buses or trains.” This, in turn, would increase the number of cars on the road and average travel time by 5.5% in Boston’s downtown neighbourhood.

Policy-makers must expect the impact of AVs to vary not only city by city but also neighbourhood by neighbourhood, the study concluded. Policies and incentives will be needed to foster the technology’s innovation while ensuring that its benefits far outweigh its challenges. Potential measures to improve citywide travel time include:

  •  Introduction of occupancy-based pricing schemes to discourage riding alone — this could improve travel time by 15%

  • Conversion of what was once on-street parking to dedicated pick-up or drop-off areas, surface mass transit or driving lanes — this could lead to a decrease in travel time by 10%

  • Similarly, designation of dedicated lanes for shared autonomous vehicles — this could decrease travel time by 8%

Ad Loading...


The report, Reshaping Urban Mobility with Autonomous Vehicles: Lessons from the City of Boston, details the findings from collaboration with BCG in partnership with the City of Boston and the project’s community of working group members.

More New Mobility

A Valley Metro bus
Managementby StaffApril 28, 2026

Keolis Contract Extended for Valley Metro's East Valley Fixed-Route Bus Service

Under this extension, Keolis will continue to manage and operate fixed-route bus service across the East Valley, serving communities including Tempe, Mesa, Chandler, Scottsdale, the town of Gilbert, parts of Phoenix, and the Gila River Indian Community.

Read More →
A MOIA/Beep vehicle on the road
New Mobilityby StaffApril 24, 2026

MOIA America Teams with Beep to Grow US Footprint

Through the strategic partnership, MOIA America will provide MOIA’s turnkey autonomous mobility solution. This includes purpose-built, autonomous-ready ID. Buzz vehicles equipped with the self-driving system developed by Mobileye, as well as operator training and enablement.

Read More →
A rider looking at a Via map on a smartphone
New Mobilityby StaffApril 6, 2026

NJ TRANSIT Introducing New Microtransit Pilot

The service will offer free connections to major bus stops and park-and-rides, linking customers to NJ TRANSIT’s fixed-route bus network.

Read More →
Ad Loading...
frontrunner bus
SponsoredApril 1, 2026

Breaking Accessibility Barriers with the Low Floor Frontrunner Minibus

Accessible transit isn’t a feature—it’s a responsibility. This whitepaper explores how the Low-Floor Frontrunner is redefining mobility with a breakthrough design that removes barriers, empowers riders, and delivers measurable operational advantages for agencies. Discover why this next generation minibus is setting a new standard for inclusive transportation.

Read More →
A new LexRide vehicle for Lextran's on-demand service.
New Mobilityby StaffMarch 31, 2026

Kentucky's Lextran Launches LexRide to Enhance Downtown Mobility

LexRide connects key destinations, including Downtown Lexington, the Distillery District, and the Warehouse Block/National Avenue area, making it easier to explore without worrying about parking, traffic, or multiple rideshare trips.

Read More →
Opening art for Sustabinability Partners Q&A
Zero Emissionsby Alex RomanMarch 25, 2026

Inside EVaaS: A New Model for Airport Fleet Electrification

Sustainability Partners’ Arnold Albiar discusses how a service-based approach is helping airports and public agencies deploy and manage electric fleets more efficiently.

Read More →
Ad Loading...
Officials and community leaders cut a ribbon in front of a Pace On Demand shuttle bus outside Rolling Meadows City Hall to celebrate expanded on-demand transit service in northwest Cook County.
New Mobilityby News/Media ReleaseMarch 9, 2026

Chicago Pace Expand On-Demand Transportation Program

The expanded service builds on Pace’s growing On Demand network and is intended to improve access to destinations such as medical appointments, schools, shopping, employment centers and connections to the regional transit system.

Read More →
A vehicle that will be used for MARTA's Reach mobility program.
New Mobilityby StaffMarch 2, 2026

Atlanta's MARTA Set to Launch New On-Demand Transportation Service

An important part of the authority’s NextGen Bus Network, MARTA Reach will bring transit service directly to the rider’s location and offer a seamless link to the broader rail and bus system.

Read More →
A black and blue HOLON urban autonomous vehicle on a city street.
New Mobilityby Elora HaynesFebruary 26, 2026

CharterUP Moves to Scale Autonomous Shuttle Deployments Through HOLON Partnership

The partnership aims to accelerate the rollout of electric, high-capacity autonomous shuttles for campuses, airports, transit systems, and more.

Read More →
Ad Loading...
Portrait of Joshua Schank, Ph.D., alongside the ACES Mobility Coalition logo.
Managementby StaffFebruary 16, 2026

ACES Mobility Coalition Selects Joshua Schank as New Executive Director

Veteran transportation innovator to lead coalition as it pushes nationwide expansion of shared autonomous mobility.

Read More →