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City engineers press TxDOT to fix detection and phasing at Hwy‑29/Main intersection; council seeks flashing‑red off‑peak option
Summary
A city traffic study found detectors and split‑phase timing at the Hwy‑29/Main intersection are not operating correctly, producing long waits; TxDOT accepted staff recommendations to remove split phasing and reconfigure detectors, and council asked staff to explore a flashing‑red schedule for off‑peak hours and report costs and timelines.
Liberty Hill — City engineers presented a traffic study for the intersection of Main Street and RM 1869, concluding that the signal’s split phasing and detector configuration are not operating as intended and can result in extended waits (signals timing out at a 150‑second maximum in some conditions).
The study identified peak periods (AM 7:15–8:15; PM 4:30–5:30; school 2:00–4:00) and said the heaviest queuing occurs on RM 1869 westbound and Loop 332 southbound. Staff recommended removing split phasing (moving to coordinated phases with two green intervals rather than rotating single greens), replacing/modifying signal heads and ensuring detectors are functioning in 'free operation' during late‑night hours. The report said TxDOT acknowledged and accepted the recommendations; the city will press TxDOT on repairs and on a possible off‑peak flashing‑red schedule.
Council members discussed safety trade‑offs, historical performance before the light was installed, and potential costs. Staff estimated the worst‑case cost to rework signal infrastructure at about $20,000 but said many fixes are simple (TxDOT has spare equipment and may perform changes at low cost if engaged). Council asked staff to return with firm cost and timeline estimates and to continue pressing TxDOT for implementation.
