I-95 Corridor Coalition – Vehicle Probe Project (VPP)

INRIX Data Evaluation January 3, 2012

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

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

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

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

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

RITIS – VPP Interface

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)

For More Information

Ed Stylc (410) 732-0500 x1031 [email protected]

www.baltometro.org