An integrated microsimulation, geometric-design and project-delivery suite for any intersection — operations, safety, capacity, alternatives, signal timing, construction staging and design-horizon forecasting on one editable model. Load a project, paste in counts, and the whole suite re-analyses.
IDM microsimulation with HCM level-of-service for the stop-controlled and signalized junction, including RRFB pedestrian yielding.
Open 02 Geometric DesignTAC design-vehicle turning checks with tractrix off-tracking, swept envelopes and curb / median encroachment flags.
Open 03 Traffic ControlMUTCD peak-hour warrant screening, plotting live turning-movement counts against the Figure 4C-3 curves.
Open 04 CapacityHCM two-way-stop 95th-percentile queues by movement and left-turn bay storage adequacy, drawn to scale.
Open 05 SafetyStopping and intersection sight distance per TAC / AASHTO, with departure sight triangles on the junction plan.
Open 06 Active TransportTAC 2014 treatment selection from AADT, speed and cross-section, with the Table 1 matrix and Figure 8 assessment.
Open 07 VisualizationAn interactive Three.js model of the junction on the 100% design drawing — live vehicles, shadows, day/night, signal & RRFB states, with orbit and follow-vehicle cameras.
Open ◫ DiagnosticsMonte-Carlo delay distributions, simulated-vs-HCM validation, live trajectory, queueing and time-series diagrams, and a signal phase view — straight off the running microsimulation.
Open 08 Decision SupportStop, signal and roundabout options scored side-by-side on operations, safety, queueing and cost with an adjustable multi-criteria weighting.
Open 09 Predictive SafetyHSM predictive crash frequency, surrogate conflict points and crash-modification factors for each control alternative.
Open 10 CapacityHCM 6th single- and double-lane roundabout entry capacity, control delay and level of service by approach.
Open 11 Traffic ControlWebster optimal cycle and green splits with HCM control delay, critical-movement timing and a phase ring.
Open 12 Project DeliveryWork-zone capacity, staging delay, queue and road-user cost for lane-closure and flagging options on the mainline.
Open 13 Horizon AnalysisCompound growth to the design year with a Monte-Carlo probability of failure, tracking mainline v/c and side-road LOS.
Open KB Knowledge BaseEvery TAC, BC Supplement, PCCG and MMCD value that grounds this suite — sight distance, alignment, clear zone, flare geometry, crossing selection — each linked to its source article.
Open §620 Roadside SafetyClear-zone width with horizontal-curve correction, roadside-barrier screening and barrier flare geometry per BC Supplement §620, §610.01 and Table 640.A.
Open §430 Geometric DesignLane and shoulder widths, design-speed range, cross-fall and side-slope by BC road class (Table 430.A), with bikeway and median-barrier guidance.
Open ★ WorkspaceCreate, switch and save projects for any intersection — edit counts, geometry and speeds and the whole suite re-analyses. Then export a WSP report.
Open| Appr | Vol | v/c | Delay | LOS | Q95 |
|---|
| Move | Swept (m) | Off-trk (m) | Result |
|---|
| Condition | Need | Have | Met? |
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| Move | v | cap | v/c | Q95 | Q95 m |
|---|
Every module in this suite runs off one shared, editable model. Create a project for any intersection, paste in turning-movement counts, set geometry and posted speeds, and the whole suite re-analyses automatically. Projects are saved in this browser.
Side-by-side operations, safety, queueing and cost for the candidate intersection control types, evaluated on the active project's peak-hour demand. The weighted multi-criteria score (lower is better) ranks the options; adjust the weights to reflect client priorities.
Surrogate safety from the simulation's geometric conflict points, plus HSM (Highway Safety Manual) predictive crash frequency for the intersection and the expected effect of each control alternative through crash-modification factors.
HCM 6th Edition single- and double-lane roundabout capacity by approach, with control delay and level of service from the active project's demand and the entry/circulating geometry.
Webster optimal cycle length and green splits for a two-phase signal on the active demand, with HCM control delay and level of service. Critical movements drive the timing; adjust lost time and saturation flow as needed.
Work-zone capacity and the resulting delay, queue and road-user cost for staging options on the mainline — full closure with detour, single-lane alternating under flagging, or a lane shift on the shoulder — evaluated against the peak-hour mainline demand.
Projects the active demand forward at a compound annual growth rate to the design horizon, tracking mainline volume-to-capacity and the side-road level of service. A Monte-Carlo run over an uncertain growth rate gives the probability that the intersection fails (side-road LOS F) by each year.
The TAC, BC Supplement to TAC, TAC Pedestrian Crossing Control Guide and MMCD values that ground every module in this suite — extracted from the project Engineering Knowledge Base. Each table links to its source article.
Clear-zone width, horizontal-curve correction, roadside-barrier screening and barrier flare geometry per BC Supplement §620, §610.01 and §640.01.
Clear-zone framework values adopt the AASHTO RDG Table 3-1 basis used by TAC; confirm cell values against BC Supp Table 620.A. Flare geometry is verbatim from Table 640.A (new construction / major reconstruction). Barrier Need Index requires Figure 610.A / the Barrier Warrant Calculator — this module screens the inputs and flags when a formal warrant is required.
Lane and shoulder widths, design-speed range, cross-fall and side-slope by BC road class (BC Supp Table 430.A), with shoulder-bikeway (Table 430.B) and median-barrier (§630.01) guidance.