active transportation

This guidebook from the Transportation Research Board provides guidance for practitioners on modeling bicycle and pedestrian use. Based on a literature review and extensive discussions with practitioners, the guidebook compiles the best practices for estimating bicycle and pedestrian demand. After extensively reviewing and demonstrating the models mentioned below, the authors offer recommendations for their use, based on contexts, such as scope of project and agency size.

The models covered are: Tour-Generation and Mode-Split Models, which account for multi-trip and multi-modal “tours”; GIS-Based Walk-Accessibility Models, which are essentially a more powerful, network-based WalkScore; Enhancements to Trip-Based Models, which insert a “pre-mode split” step to improve on the traditional, auto-focused Transportation Analysis Zones; the Walk Trip Generation and Flow Models, which use some elements of traditional modeling, but introduce finer measurements, such as Pedestrian Analysis Zones; the Portland Pedestrian Models, which synthesize the previous two pedestrian models; and the Facility Demand Models, which are split between route choice models for bicycles, based on conditions of facilities and the terrain, and direct demand models that predict walk or bike facility use and volumes based on observed counts and context-driven regression models.