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Assessing BRT Alternatives on Ashland Avenue

Chicago Transit Authority Chicago, Illinois, USA
CDM Smith helped the Chicago Transit Authority (CTA) analyze the benefits of bringing bus rapid transit (BRT) to one of Chicago’s busiest corridors.

CDM Smith performed a year-long alter­na­tives analysis of two avenues—Ashland and Western— with the goal of increasing transit speed and reliability. Based on the results and public input, CTA chose to pursue a 16-mile, center-running, bus-only lane on Ashland Avenue. Tasked with fast tracking subsequent project phases, CDM Smith completed a National Envi­ron­men­tal Policy Act (NEPA) assessment, conceptual engineering and design in record time.

urban corridor with 200,000+ residents
bus riders per day
%
increase in bus speeds through center-running, bus-only lanes

With more than 31,000 bus boardings per weekday, Ashland Avenue has the highest ridership of all CTA routes; one in four households within the proposed project area does not own a car. Roughly 232,000 live within the 16-mile stretch, which connects to seven local and two commuter rail stations, 37 bus routes and nearly 134,000 jobs in walking distance. In addition, expansive population growth outside the central business district has occurred and is expected to continue. Ashland was chosen for advancement to accommodate this growth, avoid future congestion and offer an enhanced, sustainable and premium transit option for the community.

A dedicated, center-running, bus-only lane would increase bus speed by 83 percent—or reduce a 30-minute bus trip to 16 minutes.

One of the major benefits established during the alternatives analysis was the ability to create a dedicated, center-running, bus-only lane, which would increase bus speed by 83 percent—or reduce a 30-minute bus trip to 16 minutes—and eliminate friction with cars parked curbside. In addition to the center-running lane, others factors were considered: frequency of buses, roadway geometrics, traffic data, parking, removal of lanes and left turns, vehicle design and traffic signaling among others.

Following the analysis, CDM Smith performed the conceptual engineering and NEPA analysis to identify ways to avoid impacts through design early in the project development process. Extensive traffic analysis was conducted using a number of models to understand impacts to traffic conditions along Ashland Avenue, including nearby parallel arterial roadways and neighborhood level roadways where traffic is most expected to divert.

The NEPA assessment evaluated potential impacts to cultural and historic resources, noise and air quality, land use and economic development, and pedestrian space among others. In all phases, CDM Smith also helped coordinate an outreach program to educate the public about the project, including developing key messages; producing meeting materials, fact sheets and pamphlets; distributing a magazine with reports and graphics; and planning and attending public meetings.

Steve Goodreau Steve Goodreau
None of our projects are done in a vacuum. Project delivery is about teamwork.
Insight
Is Autonomous Bus Rapid Transit the Next Evolution of BRT?
http://www.masstransitmag.com/article/12270117/is-autonomous-bus-rapid-transit-the-next-evolution-of-brt
CDM Smith technical strategy leader Tim Sorenson explores the future of BRT and the oppor­tu­ni­ties that are presented by autonomous vehicle integration in this Mass Transit Magazine feature.
Read the Article Opens in new window.

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