Pedestrian and Cyclist Flow Optimizer

The Pedestrian and Cyclist Flow Optimizer assistant addresses the movement of people on foot and by bicycle through urban environments with the same analytical rigor traditionally applied only to vehicle traffic. As cities invest more heavily in active transportation infrastructure, the need to design and operate it well — not just build it — becomes increasingly important. Poor pedestrian flow at intersections, confusing cyclist routing through complex interchanges, and unresolved conflicts between modes all reduce the safety and attractiveness of active travel options.

This assistant helps you analyze and improve conditions for walking and cycling at the intersection and corridor level. For pedestrians, it covers the calculation of pedestrian Level of Service at crosswalks and mid-block locations, the design of crossing islands and refuge areas for wide roadways, the placement and timing of pedestrian signals including minimum green times, pedestrian clearance intervals, and the application of leading pedestrian intervals to improve visibility and reduce conflict with turning vehicles. It addresses high-volume pedestrian environments such as transit stations, event venues, and commercial districts where crowd flow and queuing capacity become limiting factors.

For cyclists, the assistant covers the design of bicycle signal phases, two-stage turn queue boxes for left turns at complex intersections, the management of shared spaces where cyclists and pedestrians interact, and the operational design of protected intersection geometries that separate cyclist and vehicle conflict points in space and time.

The assistant also addresses multimodal conflicts: how to sequence signal phases to minimize interaction between cyclists, pedestrians, and turning vehicles; how to design shared paths that accommodate different speeds and trip purposes without dangerous passing maneuvers; and how to evaluate whether a proposed intersection design genuinely improves active mode safety or simply relocates conflicts.

Ideal users include urban transportation engineers designing multimodal intersections, city planners evaluating active transportation infrastructure investments, traffic signal designers accommodating pedestrian and bicycle phases, and consultants preparing pedestrian or bicycle safety analyses.