1. INRIX Data Evaluation I-95 Corridor Coalition – Vehicle Probe Project (VPP) I-95 Corridor Coalition – Vehicle Probe Project (VPP) January 3, 2012

2. Speed and Travel Time Monitoring Present day – GPS Floating Car Method – Average of 7 trials in each direction – Data collection during peak periods Future – Vehicle Probe Data – Blends use of state installed sensors, commercial fleets, and consumer GPS

3. INRIX – Private sector provider of traffic information – Independently validated by the I-95 Corridor Coalition Vehicle Probe Project – Conditions calculated and updated every minute – 100% detection of all freeway slowdowns; travel time accuracy above 95% – 99.9% availability

4. Advantages of Probe Data Continuous monitoring (24/7/365) Probe-based speed data is superior to location-fixed detector speed data Complements other traffic data sources; enables more robust congestion analyses

5. Issues No traffic volumes Technical details regarding data collection and processing remain unrevealed Must rely on the VPP verification process Current VPP coverage is limited (esp. arterials) Uncertainty of funding for future data purchases

6. RITIS Regional Integrated Traffic Information System – automated data sharing, dissemination, and archiving system – functions include—the real-time fusion and exchange of regional transportation data; and data archiving – University of Maryland CATT Lab

8. RITIS – VPP Interface

13. Conclusions VPP data shows congestion in the same locations as traditional GPS floating car trials Arterial coverage currently insufficient VPP – freeways GPS – arterials & corridor studies (BRAC)

14. For More Information Ed Stylc (410) 732-0500 x1031 estylc@baltometro.org www.baltometro.org