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Staff: RRFB cost, code offsets and sight-line limits complicate crosswalk fixes
Summary
City staff and committee members said a rapid rectangular flashing beacon (RRFB) could cost about $28,000 — four times the committee's $8,000 budget — and that code offsets and sight-line requirements may prevent installing some beacon configurations, requiring further study and outside funding.
Committee members and staff cautioned that the engineering constraints and cost of a rapid rectangular flashing beacon (RRFB) complicate a quick fix. A staff member estimated an RRFB with push-button lights at about $28,000, while the committee's budget for the program is roughly $8,000; the chair said that a single RRFB would "wipe out 4 times our budget."
Staff also noted compliance requirements for RRFB placement and offsets: current city code tolerated a roughly 100-foot offset between drives but a new code under development calls for a 150-foot offset that might make the present crosswalk location noncompliant. Committee members said the corridor's topography, sidewalk gaps and nearby driveways would require surveying crash history, repeating traffic counts and reviewing the federal manual and local code before recommending construction or relocation.
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