Unit Cost Entry

Unit Cost Element - In-Vehicle Navigation System

Unit Cost Component - In-vehicle Navigation (IVN) unit

San Antonio, Texas, United States


Alpine IVN unit deployed to public agencies in San Antonio as par tof the TransGuide MMDI program.

Cost Type


Data Date


Reported Units



Each (EA)

Year (Dollars)


Capital Cost per Unit ($)


O & M Cost per Unit ($)





TransGuide used the Subcarrier Traffic Information Channel (STIC)-FM protocol to transmit the real-time information to the IVN units. Public agencies provided with the IVN units included fire departments, police departments, the City of San Antonio, Texas DOT, Texas Department of Public Safety, agencies using paratransit vehicles, and other agencies. O&M costs include unit maintenance and database updates.


Metropolitan Model Deployment Initiative: San Antonio Evaluation Report - Final Draft

Author: Carter, M., et al.

Published By: Federal Highway Administration, U.S. DOT

Prepared by SAIC for the U.S. DOT

EDL Number: 12883

Other Reference Number: Report No. FHWA-OP-00-017

URL: https://rosap.ntl.bts.gov

Related System Cost ID: 2004-00065

Unit Cost Details

Capital Cost per Unit: $2,853.00

O&M Cost per Unit: $94.00

Year (Dollars): 1998

Lifetime: years

Costs From This Source

An advanced highway-rail intersection warning system was deployed for just over $350,000 as part of the San Antonio Metropolitan Model Deployment Initiative.

In-vehicle navigation units and real-time traveler information software development were the main cost drivers for the San Antonio TransGuide MMDI project to improve operations at several public agencies.

Over half of the $3.25 million cost for the San Antonio Lifelink advanced telemedicine project was attributed to reseach and development.

The integrated freeway/incident management system covering 28.9 miles in San Antonio was deployed for approximately $26.6 million.

Benefits From This Source

Evaluation indicated that integrating DMS and incident management systems could reduce crashes by 2.8 percent, and that integrating DMS and arterial traffic control systems could decrease crashes by 2 percent, in San Antonio, Texas.

Evaluation of freeway DMS integrated with incident management in San Antonio, Texas, found fuel consumption reduced by 1.2 percent; integrating the DMS with arterial traffic control systems could save 1.4 percent.

In San Antonio, Texas, 60 percent of drivers of transit vehicles equipped with in-vehicle navigation devices reported that they saved time and felt safer.

In San Antonio, Texas, focus group participants felt that DMS were a reliable source of traffic information.

In San Antonio, Texas, usage of a traveler information Web site increased at a rate of 19 percent per year and spiked during severe weather events.

Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that drivers of vehicles with in-vehicle navigation devices could experience an 8.1 percent reduction in delay.

Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that integrating DMS, incident management, and arterial traffic control systems could reduce delay by 5.9 percent.

Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that users of an improved traveler information web site would receive annual benefits of a 5.4 percent reduction in delay.

Related Unit Cost Subsystems

Vehicle On-Board (VS)


None defined

ID: 2012-02437