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California Rural Counties Task Force - Rural Induced Demand Study
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Requested Action(s)
recommendation
Informational presentation and material distribution sharing item regarding the Rural Induced Demand Study released by the California Rural Counties Task Force (RCTF).
a.) This item is for informational purposes only. No formal action is required at this time, however
b.) Consider directing staff to return to a future meeting with an analysis of how the study’s findings may impact local or regional transportation planning efforts. Consider possible endorsement of the study findings and direct staff to communicate the results to relevant state agencies, advocating for updates to existing guidance on induced demand in rural areas.
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Financial Impact:
None at this time.
Background Information:
The California Rural Counties Task Force (RCTF) has officially released the Rural Induced Demand Study (February 2025) in response to the implementation of Senate Bill 743 (Steinberg, 2013) and its statewide application to transportation projects.
The study examines the impact of state policy on capacity-increasing projects in rural areas, particularly the use of Vehicle Miles Traveled (VMT) as the primary metric for determining transportation impacts.
While existing guidance on induced demand is largely based on research in congested urban highways, this study seeks to determine the extent to which induced demand occurs in rural highway corridors and to provide recommendations for refining state policies and environmental analyses.
The findings highlight the unique challenges faced by rural agencies in securing funding for critical regional projects, including safety improvements, evacuation routes, connectivity enhancements, access expansions, and goods movement.
Key Findings:
Existing methodologies for assessing induced demand are not well-suited for rural contexts.
Project location and context must be key considerations in project-level analyses.
Many rural corridors lack the conditions that typically lead to induced demand, such as significant congestion, latent demand, or significant travel time reductions.
"Lane miles" is not an ideal proxy for measuring induced travel, as travel behavior changes primarily due to reduced travel times and increased access to developable land.
Travel surveys indicate that substantial travel time reductions (15+ minutes) are required to influence travel behavior.
Traditional elasticity-based methods lack the necessary specificity for project-level analysis under CEQA and should be used with caution.
A hybrid methodology combining travel demand models and elasticity-based approaches can provide more accurate assessments.
The study proposes an "Induced Demand Screening Criteria" to guide the evaluation of projects where induced demand is unlikely to occur.