Simple calculator for Rotary vs traffic signal decisions

Rotary vs Traffic Signal — Clean Decision Output (IRC referenced)

Enter site values below and click Calculate. The tool applies IRC‑referenced rules and outputs a clean scoring table with IRC clause references and final recommendation.

Are approach flows balanced? (approx. within ±25%) YesNo

Peak entering volume (veh/hr) — typical approach

Right-turn share (%)

Pedestrian crossing (p/h)

Reported accidents last 12 months (count)

85th percentile speed (km/h)

Available central island diameter (m) — set 0 if none

Criterion	IRC Reference	Condition met	Rotary pts	Signal pts

Total Rotary Score: 0

Total Signal Score: 0

Notes: The points and IRC references are for guidance and documentation. Always apply full IRC code and local engineering judgement for final decision and design.

Prepared per user request — clean output format with IRC clause references.