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A traffic Area of Benefit (AOB) is a development traffic mitigation fee program designed to improve the capacity and safety of the County’s road network within a defined boundary as development occurs. The AOB fee programs are supported by County ordinances which are adopted by the County Board of Supervisors. Money collected within a given AOB will be used to fund road improvement projects that mitigate traffic impacts generated by new development projects.
Anyone who develops property and adds additional vehicle trips to the road network is subject to AOB fees. This includes, but is not limited to property owners, residential developers, commercial developers, and industrial developers.
What are some of the possible fee categories?
AOB Funds are used to fund projects that improve the capacity and safety of the existing roadway network. AOB funds will be used to fund projects that are listed on the AOB project list. AOB project lists are available at the Contra Costa County Public Works Department.
AOB fees are determined based upon the relationship between the total estimated cost to construct road improvement projects on the AOB project list and development potential projections within the AOB boundary.
Fees are adjusted periodically to reflect changes in development potential and traffic needs. Fees are also subject to change annually based on changes in the applicable construction costs index.
AOB fees are calculated during the plan check phase of your project. If you would like an AOB fee estimate earlier, you may contact the AOB Program Manager at the Contra Costa County Public Works Department at 925-313-2000.
AOB fee waivers are granted only when vehicle trips are not added to the road network as a result of the proposed development. (e.g. replacing an existing single family home, with a new single family home)
AOB fee credits are granted when the preexisting use is replaced by a new use that generates more traffic. The applicant would receive credit for traffic generated by the preexisting use. A project that changes a single family home into a commercial/retail building, or modifies a light industrial building into a commercial/retail building are examples of projects that would receive fee credit.
Contact the AOB program manager at the Contra Costa County Public Works Department at 925-313-2000.
AOB fees are collected through the Department of Conservation and Development, Building Inspection Division at the issuance of the building permit. Fees are collected at the rate in effect at the time the building permit is issued.
The Area of Benefit (AOB) Program is based on the following government codes:
The current Area of Benefit (AOB) fee schedule can be found by following this link: Traffic Fee Schedule (PDF).