Skip to Content
Streetsblog USA home
Log In
Bicycling

How Can Cities Move More People Without Wider Streets? Hint: Not With Cars

1:56 PM EDT on May 10, 2016

NACTO_transit_lanes
Here's how many people a single traffic lane can carry "with normal operations," according to the National Association of City Transportation Officials.

How can cities make more efficient use of street space, so more people can get where they want to go?

This graphic from the new NACTO Transit Street Design Guide provides a great visual answer. (Hat tip to Sandy Johnston for plucking it out.) It shows how the capacity of a single lane of traffic varies according to the mode of travel it's designed for.

Dedicating street space to transit, cycling, or walking is almost always a tenacious fight, opposed by people who insist that streets are for cars. But unless cities make room for pedestrians, cyclists, and transit riders, there's no room for them to grow beyond a certain point.

NACTO writes:

While street performance is conventionally measured based on vehicle traffic throughput and speed, measuring the number of people moved on a street -- its person throughput and capacity -- presents a more complete picture of how a city’s residents and visitors get around. Whether making daily commutes or discretionary trips, city residents will choose the mode that is reliable, convenient, and comfortable.

Transit has the highest capacity for moving people in a constrained space. Where a single travel lane of private vehicle traffic on an urban street might move 600 to 1,600 people per hour (assuming one to two passengers per vehicle and 600 to 800 vehicles per hour), a dedicated bus lane can carry up to 8,000 passengers per hour. A transitway lane can serve up to 25,000 people per hour per travel direction.

Of course, it usually takes more than changing a single street to fully realize these benefits. A bike lane won't reach its potential if it's not part of a cohesive network of safe streets for biking, and a transit lane won't be useful to many people if it doesn't connect them to walkable destinations.

But this graphic is a useful tool to communicate how sidewalks, bike lanes, and transitways are essential for growing cities looking to move more people on their streets without the costs and dangers inherent in widening roads.

Stay in touch

Sign up for our free newsletter

More from Streetsblog USA

Distracted Off-Duty Cop Jumped Curb and Killed Chicago Woman On Sidewalk

It's infuriating that a person who was entrusted to help keep the public safe was reckless enough to take her eyes off the road while driving to pick up a phone, with tragic consequences.

December 8, 2023

Friday’s Headlines Include Transit

An International Association of Public Transport study found that many countries are neglecting transit in their plans to combat climate change.

December 8, 2023

Calif. Using“Auxiliary Lane” Freeway Widening Loophole for Non-Aux Lane Projects

Beyond just using harmful loopholes legally, Metro and Caltrans deceptively bypass environmental regulations in order to keep on widening freeways.

December 8, 2023

Talking Headways Podcast: Sausage Making and the ADA

"It is fundamentally inappropriate to keep charging disabled people twice as much," our guest Ron Brooks says.

December 7, 2023

The Real Reason Assaults Against Transit Workers Are On The Rise

Hint: it's not just because service has been slashed.

December 7, 2023
See all posts