SBCAG approves final State Route 166 corridor study, directs staff to file CEQA notice
January 16, 2026 | Santa Barbara County, California
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The Santa Barbara County Association of Governments on Jan. 15 approved a final comprehensive corridor study for State Route 166, a planning document that recommends safety, transit and freight improvements between Guadalupe and Santa Maria.
The study, prepared with consultant DKS Associates and SPCAG staff, analyzed existing conditions, ran a performance-based benefit assessment and identified short-, medium- and long-term improvements. Jim Dankovich, principal at DKS, told the board the study exceeded outreach goals – “we got close to 500 surveys, filled out” – and reported a benefit–cost ratio of 2.66 for the package. He said the ratio likely understates some agriculture-related benefits that were outside the study’s monetization scope.
Key short- and mid-term recommendations include intersection signalization and channelization at high‑conflict locations, targeted lighting, paved driveway aprons to reduce dust from agricultural access, and transit service enhancements (including additional CalVans vehicles and a new 35‑foot bus to reduce headways on the Guadalupe–Santa Maria route). The report also sets out longer-term options, including a potential 4‑lane widening and a bidirectional class‑1 multiuse trail on the south side of SR‑166 as part of a future Measure A renewal package; DKS estimated a 2040 construction-year cost for the 4‑lane widening at about $320 million.
Public commenters and stakeholders were sharply divided on some elements. Claire Wyman, president of the Grower Shipper Association of Santa Barbara and San Luis Obispo Counties, urged a modest 4‑lane widening and opposed the Santa Maria River Levee trail at its current location, saying it created “significant food safety and operational concerns.” Maribel Aguilera, a Santa Maria city councilmember, urged the board to prioritize widening, saying residents “deserve a safe, reliable corridor connecting our communities.”
Board members focused questions on peak‑hour agricultural commute patterns, the study’s treatment of early‑morning peaks, and the degree to which safety improvements would be phased or bundled for competitive state and federal grants. DKS staff confirmed the study examined an early agricultural AM peak (around 5–6 a.m.), a standard commuter AM peak and a PM peak and used SBCAG travel demand modeling to estimate future demand.
After discussion, the board voted 11–2 to approve the final study and to direct staff to file a notice of exemption under the California Environmental Quality Act, allowing SBCAG to incorporate the study’s priorities into future planning and grant applications. The approval does not itself fund or authorize construction; projects would still require separate environmental review, design and funding decisions.
SBCAG staff said the study was intended to be a “living” document that can be updated as local conditions and development (including proposed logistics or distribution centers) change. The board also discussed pursuing targeted competitive programs, including Trade Corridor Enhancement and the Highway Safety Improvement Program, to fund initial improvements.
The board’s action means SR‑166 project concepts will be carried forward into SBCAG’s planning work and considered for future Measure A and grant applications; no construction contracts or final designs were adopted at the meeting.
The study, prepared with consultant DKS Associates and SPCAG staff, analyzed existing conditions, ran a performance-based benefit assessment and identified short-, medium- and long-term improvements. Jim Dankovich, principal at DKS, told the board the study exceeded outreach goals – “we got close to 500 surveys, filled out” – and reported a benefit–cost ratio of 2.66 for the package. He said the ratio likely understates some agriculture-related benefits that were outside the study’s monetization scope.
Key short- and mid-term recommendations include intersection signalization and channelization at high‑conflict locations, targeted lighting, paved driveway aprons to reduce dust from agricultural access, and transit service enhancements (including additional CalVans vehicles and a new 35‑foot bus to reduce headways on the Guadalupe–Santa Maria route). The report also sets out longer-term options, including a potential 4‑lane widening and a bidirectional class‑1 multiuse trail on the south side of SR‑166 as part of a future Measure A renewal package; DKS estimated a 2040 construction-year cost for the 4‑lane widening at about $320 million.
Public commenters and stakeholders were sharply divided on some elements. Claire Wyman, president of the Grower Shipper Association of Santa Barbara and San Luis Obispo Counties, urged a modest 4‑lane widening and opposed the Santa Maria River Levee trail at its current location, saying it created “significant food safety and operational concerns.” Maribel Aguilera, a Santa Maria city councilmember, urged the board to prioritize widening, saying residents “deserve a safe, reliable corridor connecting our communities.”
Board members focused questions on peak‑hour agricultural commute patterns, the study’s treatment of early‑morning peaks, and the degree to which safety improvements would be phased or bundled for competitive state and federal grants. DKS staff confirmed the study examined an early agricultural AM peak (around 5–6 a.m.), a standard commuter AM peak and a PM peak and used SBCAG travel demand modeling to estimate future demand.
After discussion, the board voted 11–2 to approve the final study and to direct staff to file a notice of exemption under the California Environmental Quality Act, allowing SBCAG to incorporate the study’s priorities into future planning and grant applications. The approval does not itself fund or authorize construction; projects would still require separate environmental review, design and funding decisions.
SBCAG staff said the study was intended to be a “living” document that can be updated as local conditions and development (including proposed logistics or distribution centers) change. The board also discussed pursuing targeted competitive programs, including Trade Corridor Enhancement and the Highway Safety Improvement Program, to fund initial improvements.
The board’s action means SR‑166 project concepts will be carried forward into SBCAG’s planning work and considered for future Measure A and grant applications; no construction contracts or final designs were adopted at the meeting.
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