Didi Tech
Apr 23, 2019 · Big Data
Travel Time Index (TTI): Evaluation Methods, Calculation, and Validation Using Didi Trajectory Data
The Travel Time Index (TTI) quantifies urban congestion by comparing actual travel time to free‑flow conditions, and this study details domestic and international evaluation methods, free‑flow speed estimation, weight calculation, link extraction via PostGIS, system architecture, and validation using massive Didi trajectory data to support city traffic management.
GISPostGISTransportation Analytics
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