Signalised, roundabout, sign-controlled, interchange, and innovative designs — analysed with consistent lane-level methodology.
Short lanes, slip lanes, U-turns, continuous lanes — the lane configurations that drive real-world performance, modelled explicitly.
Twelve Movement Classes with distinct vehicle characteristics — from light vehicles and buses to trams and user-defined modes.
One tool for everysignalised intersection.roundabout.interchange.street & network.
A lane-based micro-analytical tool built on more than 50 years of continuous traffic research. Design, assess and compare every facility type in a single analytical environment — with results reported at the individual lane level.
Every facility type in one environment — from signalised intersections to freeway segments.
SIDRA INTERSECTION models the lane configurations that shape real-world capacity and performance. Intersections with up to 8 legs are supported.
This geometric detail is what enables the lane-based capacity, queuing and performance calculations that distinguish SIDRA from tools that model at the lane-group or approach level.
Twelve Movement Classes — each with its own vehicle characteristics. Not PCE conversions. Actual queue space, speed, acceleration and mass.
Each Movement Class retains its own characteristics throughout the analysis. Capacity, delay, queue length, travel time, stop rate, fuel consumption, emissions and operating cost are all calculated and reported separately. Bus priority lanes and signal phases, dedicated bicycle lanes and phases, and tram/light rail movements are modelled explicitly.
Pedestrian modelling in SIDRA INTERSECTION goes well beyond pedestrian minimum walk and clearance time effects on signal timing.
Optimum signal timings can be determined for minimum person delay — not just minimum vehicle delay.
Country-specific setups with default parameters based on established research. Standard and US HCM setups (Customary and Metric) included.
Analytical models run in seconds rather than minutes or hours. Analyse many design alternatives and optimise across multiple dimensions.
Results are available at Lane, Movement, Approach, Site, Network and Route levels for 10 performance metrics including Level of Service, Delay, Queue length, Back of queue, Stop rate, Travel time, Speed, Fuel consumption, Emissions and Operating cost.
Rapid setup and calibration with pre-built templates and country-specific Software Setups.
The Map Extract tool creates new Sites from map data. Country-specific Software Setups provide calibrated defaults. Parameter Sensitivity analysis supports systematic testing of key parameters.
Every facility type in one environment
Fixed-Time and Actuated control, up to 8 legs, variable phasing, multiple phase sequences, Turn On Red, slip lane signal treatment, permitted-protected turns
Unsignalised, with metering signals, and fully signalised. Five capacity model options including SIDRA Standard, HCM Edition 6, HCM 6 Extended, and HCM 2010
Two-Way Stop, Two-Way Give-Way/Yield, All-Way Stop. One of the few tools that models Give-Way/Yield
Single-point, diamond (signalised, roundabout, sign-controlled), and Diverging Diamond Interchanges (DDI)
Pre-built templates for DDI, RCUT, CFI, DLT, MUT, P-Turn, and Divergabout
Signalised and unsignalised (zebra), midblock, staged, slip lane and diagonal crossings
Merge/diverge segments, basic segments, arterial midblock, and continuous lanes
Lane-level geometric detail
SIDRA INTERSECTION models the lane configurations that shape real-world capacity and performance. Each approach can include:
turn bays, lanes with upstream parking, exit-side lane drops. The short lane model handles complex multiple short lane combinations where overflow blocks adjacent full-length lanes.
- Slip/bypass lanes
shared, exclusive with yield control, and continuous. Signal treatment includes two green periods for slip lane movements.
- Exit short lanes with merging
Priority Merge and Zipper Merge operations at any intersection type, with effect on approach lane use.
- U-Turns
modelled at all Site types including U-Turn before intersection at signalised and unsignalised Sites.
- Continuous lanes
uninterrupted flow modelling with detailed midblock performance estimates.
- Turn bans and contra-flow lanes
movement restrictions and opposing-direction lane configurations.
Intersections with up to 8 legs are supported, each with one-way or two-way traffic and multi-lane approaches. This geometric detail is what enables the lane-based capacity, queuing and performance calculations that distinguish SIDRA from tools that model at the lane-group or approach level.
Every transport user, not just cars.buses & transit.bicycles & trams.heavy vehicles.
Twelve Movement Classes — each with its own vehicle characteristics. Not PCE conversions. Actual queue space, speed, acceleration and mass.
Advanced pedestrian modelling
Pedestrian modelling in SIDRA INTERSECTION goes well beyond pedestrian minimum walk and clearance time effects on signal timing.
Pedestrian movements and signal characteristics — as explicit input
Effect of pedestrians on capacity — of vehicle movements at signalised and unsignalised intersections and midblock
Holding a red arrow — for pedestrian protection at signalised intersections
Pedestrian actuation effects — on signal timing
Pedestrian delay and queue estimates — at signalised intersections
Zebra (unsignalised) crossings — on slip lanes and at midblock locations
Staged, slip lane and diagonal crossings — at signalised intersections
Walk time extension — for accessible pedestrian phases
The results for persons given in SIDRA output include pedestrians, cyclists and people in vehicles according to occupancy characteristics. Optimum signal timings can be determined for minimum person delay — not just minimum vehicle delay.
Calibrated for local conditions.Standard setups.US HCM setups.
Country-specific setups with default parameters based on established research. Standard and US HCM setups (Customary and Metric) included.
Analyse many alternatives, quickly.in seconds.not hours.
Analytical models run in seconds rather than minutes or hours. Analyse many design alternatives and optimise across multiple dimensions.
Rapid setup and calibration
The Map Extract tool creates new Sites from map data. Country-specific Software Setups provide calibrated defaults. Parameter Sensitivity analysis supports systematic testing of key parameters.