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Traffic consultant told plan commission study assumed five drive‑thru uses; staff to require updates if conditions change
Summary
The applicant’s traffic consultant said the study conservatively assumed five drive‑thru uses. Commissioners asked staff to require an updated traffic study if cumulative drive‑thru counts or traffic modeling fall outside those assumptions.
Traffic and circulation were recurring themes during the public hearing. Andrew Bowman of KLOA, the project traffic consultant, told the commission the traffic analysis used a conservative approach that included five drive‑thru facilities to test a worst‑case scenario.
Bowman said the corridors serving the site — including the signal at the main intersection — have reserve capacity and that, under the modeled scenarios, the network would continue to operate within acceptable limits; he cautioned, however, that adding more high‑demand drive‑thru facilities could slow operations and prompted the commission to add a staff‑triggered requirement for updates to the traffic study if the number or operational characteristics of drive‑thrus changes.
Commissioners and staff discussed how stacking and queuing requirements remain enforceable at the site‑plan stage even if drive‑thrus are moved to permitted status in the PUD. The commission’s recommendation included language that requires an updated traffic analysis should the cumulative number of drive‑thrus or the nature of uses on site exceed what was assumed in the submitted study.
Why it matters: Traffic modeling guides conditions for signal timing, turn lanes, stacking lengths and possible off‑site improvements; requiring updated studies as the tenant mix changes protects the city from unexpected congestion and helps tailor mitigation measures.
