Every intersection type, every transport user, every lane — modelled with consistent methodology in one environment.
Built on foundational research that shaped the Highway Capacity Manual — not just software engineering.
Intersections, interchanges, corridors and networks — with queue spillback, signal coordination and lane-based assignment.
The SIDRA Network model connects up to 50 Sites into a single analytical network where each Site retains its full lane-based modelling detail.
The congestion effects that drive gridlock — a blocked turn bay, a short lane that overflows, a downstream queue that spills back — all occur at the lane level. Link-based models aggregate these effects away.
The Network model is the analytical engine upon which SIDRA ASSIGN is built.
Fuel consumption, emissions and operating cost integrated into every analysis — from the same four-mode drive cycle model that calculates delay and travel time.
Fuel, CO₂, CO, HC, NOₓ calculated separately by Movement Class. Signal timing optimisation can target environmental objectives. With SIDRA ASSIGN, Trip Performance metrics extend to assignment results.
Intersection Design & Analysisevery type, one environment
Unlike tools that specialise in a single facility type or reduce intersection detail to lane groups, SIDRA models every facility at the individual lane level using a consistent analytical framework.
Network Modellinglane-level precision across 50 Sites
Queues form lane by lane in the real world. Link-based models aggregate these effects away. The SIDRA Network model preserves them.
The SIDRA INTERSECTION Network model connects up to 50 Sites — any combination of signalised intersections, roundabouts, sign-controlled intersections and pedestrian crossings — into a single analytical network where each Site retains its full lane-based modelling detail.
This is fundamentally different from network models that aggregate traffic conditions into links or lane groups. The congestion effects that drive gridlock — a blocked turn bay, a short lane that overflows, a downstream queue that spills back — all occur at the lane level.
The SIDRA Network model is the analytical engine upon which SIDRA ASSIGN is built. No export, no translation between formats, no separate licence.
Roundaboutsthe global standard
No other software provides the combination of multiple capacity model options, geometry-based capacity estimation, lane-by-lane analysis depth, and integrated network modelling for roundabouts.
Signal Timing & Coordinationfrom single sites to coordinated networks
Critical Movement Identification is unique to SIDRA. Where other tools allocate green time using simpler methods, SIDRA's critical path approach handles overlapping movements and complex phase sequences.
Environmental Analysisintegrated, not bolted on
From individual lanes to network-wide Routes, from single-period snapshots to multi-year design life projections — the environmental outputs travel with the traffic model.
Fuel consumption, pollutant emissions and operating cost estimation are integrated directly into every capacity and performance analysis. The environmental outputs come from the same four-mode elemental drive cycle model that calculates delay, stop rate and travel time.
The four-mode model constructs drive cycles from cruise, acceleration, deceleration and idling for each lane of traffic. Fuel consumption, CO₂, CO, HC, NOₓ emissions are calculated separately by Movement Class — each with its own vehicle parameters.
Signal timing optimisation can target environmental objectives. With SIDRA ASSIGN, Trip Performance metrics extend environmental reporting to assignment results — cost and fuel reported per Origin–Destination pair across assigned Routes.
SIDRA for HCMcomplements — does not replicate
The HCM's signalised intersection back of queue model was developed by SIDRA's founder. SIDRA doesn't just implement the HCM — its author helped write it.
Micro-analytical
traffic assignment
Everything on this page — lane-level precision, queue spillback, signal coordination, route performance — feeds directly into SIDRA ASSIGN. It is the only traffic assignment tool built on a micro-analytical Network model.