An eastbound major road crosses a stopped minor-road movement. Vehicles, stop markings, a highlighted conflict zone and queue counters demonstrate gap acceptance and priority. A teaching fault switch disables yielding so unsafe accepted gaps can be inspected.
• 3D scene parts: Major and minor road approaches; stop and hold line; reserved crossing conflict zone; moving vehicles and waiting queue; gap and queue recorder. • Controls: Major-road arrivals (200–1200 veh/h); Minor-road arrivals (100–900 veh/h); Major-road speed (6–18 m/s); Required crossing gap (6–10 s); Minor departure headway (2–5 s); Obey STOP / gap check (0–1 0=fault, 1=obey). • Live readouts: Minor queue (vehicles); Minor departures (vehicles); Mean departed wait (s); Next major arrival at conflict (s); Observed minor rate (veh/h); Unsafe accepted gaps (events); Overflow/spawn suppression (vehicles). • Guided experiments: Heavy major stream; Light major stream; Ignore STOP. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
Arrival headway=3600/demand Next major arrival gap=distance/speed Minor entry requires: gap≥critical gap, crossing zone clear, departure headway elapsed Observed rate=departures×3600/elapsed time Mean wait=Σ(departure−arrival)/departures
Representative single major and single minor straight movement, not a complete four-leg capacity model. Deterministic arrivals, constant speeds, simplified crossing reservation; no turning traffic, pedestrians, stochastic driver behavior or crash dynamics. Queue capped at 120, suppressed arrivals reported. Fault mode records unsafe accepted gaps; cars continue moving rather than simulating impacts. Rates early in a trial are not steady-state capacity. Try the preset experiments, then compare the live readouts with the equations.
No. It waits for a sufficient gap and a clear conflict zone.
No. It averages only vehicles that have already entered.
Representative single major and single minor straight movement, not a complete four-leg capacity model. Deterministic arrivals, constant speeds, simplified crossing reservation; no turning traffic, pedestrians, stochastic driver behavior or crash dynamics. Queue capped at 120, suppressed arrivals reported. Fault mode records unsafe accepted gaps; cars continue moving rather than simulating impacts. Rates early in a trial are not steady-state capacity.