New Research: The Traffic Calming Effect of Delineated Bicycle Lanes

February 12, 2024

Abstract

We analyze the effect of a bicycle lane on traffic speeds. Computer vision techniques are used to detect and classify the speed and trajectory of over 9,000 motor-vehicles at an intersection that was part of a pilot demonstration in which a bicycle lane was temporarily implemented. After controlling for direction, hourly traffic flow, and the behavior of the vehicle (i.e., free-flowing or stopped at a red light), we found that the effect of the delineator-protected bicycle lane (marked with traffic cones and plastic delineators) was associated with a 28% reduction in average maximum speeds and a 21 % decrease in average speeds for vehicles turning right. For those going straight, a smaller reduction of up to 8% was observed. Traffic moving perpendicular to the bicycle lane experienced no decrease in speeds. Painted-only bike lanes were also associated with a small speed reduction of 11–15 %, but solely for vehicles turning right. These findings suggest an important secondary benefit of bicycle lanes: by having a traffic calming effect, delineated bicycle lanes may decrease the risk and severity of crashes for pedestrians and other road users.

Read Article

Hannah Younes, Clinton Andrews, Robert B. Noland, Jiahao Xia, Song Wen, Wenwen Zhang, Dimitri Metaxas, Leigh Ann Von Hagen, Jie Gong,
The Traffic Calming Effect of Delineated Bicycle Lanes, Journal of Urban Mobility, Volume 5, 2024, 100071, ISSN 2667-0917, https://doi.org/10.1016/j.urbmob.2024.100071.

Recent Posts

Heldrich Report: NJ’s Energy-Efficiency Workforce Needs

New Jersey's Energy-Efficiency Workforce Needs, Infrastructure, and Equity Assessment New Jersey Governor Phil Murphy’s Energy Master Plan and Executive Order 315 set a goal to reduce fossil fuel usage to 100% clean energy by 2035. The Executive Order also called for...

Shaul Picker Receives 2024 Mortensen-Voorhees Award

Shaul Picker is the 2024 recipient of the Mortensen-Voorhees Award for Achievement in Transportation Studies. This award is granted annually to the highest-achieving student with a concentration in transportation at the Edward J. Bloustein School of Urban Planning and...

NJSPL – Key Insights from Early Offshore Wind Implementation

By Jessica Parineet Offshore wind development is in its early stages in the United States, with just under one gigawatt (GW) of utility scale capacity constructed. State decarbonization goals have catalyzed industry progress thus far, however the Biden administration...

EJB Talks: Political Update with Stuart Shapiro and Amy Cobb

Analyzing Trump's Guilty Verdict and the 2024 Election Outlook Stuart Shapiro welcomes back Amy Cobb MPAP '18 for a political update in the final EJB Talks episode of the spring 2024 season. They discuss the potential consequences of Trump's guilty verdict for...

Racial composition of road users, traffic citations, and police stops

Significance This study pioneers in mapping the racial composition of roads. Our findings highlight a disproportionate rate of citations for moving violations among Black drivers through both speed camera enforcement but more so via police stops, challenging the...

Upcoming Events