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Transportation Division
Transportation Division

 Adeline Corridor Roadway Reconfiguration Feasibility Study


The Adeline Corridor Roadway Reconfiguration Feasibility Study presents an opportunity to transform a street that is currently challenging for pedestrians, bicyclists, and people with disabilities, and lacking in usable public space into a safe and welcoming street for all users. 

The study builds on the Adeline Corridor Specific Plan effort and responds to the City Council Referral to analyze the potential for a redesign of the segment of Adeline Street between Martin Luther King Jr. Way and Ward/Shattuck Street, in order to increase safety for pedestrians, cyclists, and people living with disabilities, while also meeting the needs of public transit and emergency vehicles. The study will evaluate a “road diet” that reduces the width of Adeline Street in this segment from the current four lanes to two lanes. 

This study is a collaboration between BART and City of Berkeley that is funded by the Federal Transit Administration Transit Oriented Development Pilot grant. The outcome of this study will be the development and evaluation of near- and long-term concept designs for the corridor that work toward achieving project goals and priorities, including accommodating the Berkeley Flea Market. Refinement of the concept designs will require continued input from community stakeholders, elected officials, partner agencies, and City staff, as well as further engineering and design work. 


The project area is Adeline Street from Shattuck-Ward to MLK Jr Way. For project purposes, the area is divided into two segments: the Northern Adeline Segment—Shattuck-Ward to Ashby, and the Ashby BART Segment—Ashby to MLK Jr Way.



  • Enhance safety for all users through management of vehicle speeds, reduced crossing distances for pedestrians, and provision of a separated bike facility along the entire segment
  • Increase public space by expanding sidewalk widths and exploring the potential of a new permanent location for the Berkeley Flea Market, which may be relocated as a result of future development at the Ashby BART station.
  • Support bus transit operations by incorporating designs that increase safety for bus riders, facilitate bus and shuttle operations, improve passenger connections to BART, and reduce potential bus-bike conflicts.
  • Accommodate passenger and freight loading for businesses along the corridor, including Berkeley Bowl and Ed Roberts Campus.
  • Implement inclusive engagement practices and coordinate public outreach across ongoing projects within the study area to reach a larger and broader audience and provide multiple opportunities for meaningful interactions. Particular emphasis will be placed on coordination with the following efforts:
    • Ashby and North Berkeley BART Station Planning. The City of Berkeley is working with BART to develop new zoning reflecting a shared community vision for housing (including affordable housing), land use, building form, public space, and station access. After the visioning and rezoning is complete, in 2022 BART and the City will seek a developer for each station to build housing and other community amenities.
    • Berkeley El-Cerrito Corridor Access Plan. The Berkeley-El Cerrito Corridor Access Plan (BECCAP) provides a rare opportunity to comprehensively analyze how residents in Berkeley, El Cerrito, Richmond, Albany, Kensington, Emeryville, and Oakland who currently drive and park at the stations could access BART by other means. It will balance the need for BART-rider parking with transportation options that enhance community vibrancy and safety. Work on the plan began in January 2021 and is expected to conclude in summer/fall 2022. 


The study commenced in Spring 2021 with data collection, field observations, and analysis of existing conditions along the corridor. The concept development and evaluation process is anticipated to occur over the next year with the evaluation results and near- and long-term recommendations identified by Spring 2022.



The project team has completed the following tasks in support of the development and evaluation of concepts for the Adeline Corridor between Shattuck-Ward and MLK Jr Way: 

  • Stakeholder Engagement. The project team has held listening sessions with several stakeholders, including staff from the Berkeley Flea Market, Berkeley Bowl, and Ed Roberts Campus. The project team has also hosted work sessions with partner agencies, including Caltrans, AC Transit, and Alameda County Transportation Commission. Engagement with the community is forthcoming in summer and fall of 2021.
  • Data Collection & Field Observations. The project team has conducted field observations, conducted vehicle travel time analysis along the study corridor and two parallel routes, and collected motorist yield rate data at the unsignalized crosswalk locations along the corridor. The project team has also compiled available data, including multimodal intersection turning movement counts and average daily traffic volumes, and gathered new turning movement counts and average daily traffic and speed data to supplement the existing data set.
  • Existing Conditions & Operations Analysis. Findings from the existing conditions and operations analysis reinforce the need for safety improvements along this corridor. Adeline Street is a designated Vision Zero High Injury Street and is one of the top ten Pedestrian High Injury Streets within the City of Berkeley. The most common primary contributing factor for collisions resulting in death or injury is unsafe speed. Although the posted speed limit is 25 mph, the median speed along the corridor is 29 mph in the northbound direction and 32 mph in the southbound direction, which means that over half of drivers along the segment are traveling at speeds higher than 29 or 32 mph, respectively. The operations analysis is ongoing. Based on findings to date, existing vehicle volumes can be accommodated with removal of a vehicle travel lane in each direction, as the average daily and hourly vehicle volumes are well within the Federal Highway Administration Feasibility Criteria for a road diet. The next step is to analyze projected vehicle volumes, including with respect to impacts on bus transit vehicles. Adeline Street is a major corridor for bus service, as designated in the Berkeley General Plan and AC Transit's Major Corridors Study. Ways to improve bus operations in conjunction with a road diet will be examined.
Looking southbound on Adeline Street at Ashby Avenue. 


The project team will incorporate data and information from the completed tasks to guide the concept development process and engage with community stakeholders and agency partners to refine the designs and identify concepts to carry forward for further development and evaluation.  The concepts will seek to: 

  • Provide a permanent space that supports the continued operation of the Berkeley Flea Market, which would be relocated as a result of future development at the Ashby BART station.
  • Maximize benefits to people walking along and across Adeline Street by reducing crossing distances and increasing space for pedestrians.
  • Maximize benefits to people biking along and across Adeline Street by providing separation between bicyclists and vehicle traffic.
  • Maximize benefits to bus riders by incorporating design treatments that facilitate transit operations, provide safe and comfortable walking and biking access to the bus stop, create convenient spaces for boarding and alighting, reduce potential for bus-bicycle conflicts, and facilitate bus movement through intersections.
  • Manage vehicle speeds while optimizing vehicle progression along the corridor and minimizing increases in vehicle delay and queue lengths by optimizing signal timing and phasing and incorporating turn pockets where appropriate.

 Looking northbound on Adeline Street at Stuart Street. 

Page last updated on 07/09/2021. 

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