TTI Research Evaluation · FY2026 Q1
Corridor Mobility & Autonomous Transit Operations
Texas A&M Transportation Institute · Project 0-7114 · Austin & San Antonio Corridors
During the continuous 90-day test period on the IH-35 managed lanes, connected vehicle telemetry demonstrated a 14.8% decrease in stop-and-go wave propagation following automated variable speed advisory activations. Cross-sectional detector stations logged 4.2 million discrete vehicle passages with zero lost-time safety events attributable to sensor latency.
| Test Corridor | Mean Travel Time | Buffer Index | Incident Clear Time |
|---|---|---|---|
| IH-35 Segment North | 22.4 min | 1.18 (-8.2%) | 14.1 min |
| US-290 East Gateway | 18.1 min | 1.12 (-12.0%) | 11.8 min |
Appendix · Methodological Calibration & Verification
All inductive loop and radar telemetry underwent secondary validation against TxDOT CRIS crash report records. Bootstrap confidence intervals (B = 2,000 resamples) yielded a 95% interval of [12.2%, 17.4%] for travel time reliability enhancements.
Published by Texas A&M Transportation Institute · tti.tamu.edu