Work out trip generation rate instantly with clear inputs, formula shown and shareable results.
Trip generation multiplies development size by a published trip rate per unit, then extracts the peak hour as a percentage of the daily total, typically ten to fifteen percent. The directional split matters because an intersection is sized on the heavier direction: residential areas are outbound dominated in the morning and inbound in the evening.
Daily trips
Trips = development units x daily trip rate per unit
Peak hour
Peak trips = daily trips x peak hour share, split by direction
Trips = development units x daily trip rate per unit. Trip generation multiplies development size by a published trip rate per unit, then extracts the peak hour as a percentage of the daily total, typically ten to fifteen percent.
Surveys of comparable existing developments, published in trip generation manuals by land use category. Local rates should be preferred where available because mode share differs sharply between places.
This calculator takes 4 inputs: Development size, Daily trip rate per unit, Peak hour share of daily trips, Inbound share in the peak hour. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.