U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590

Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Transportation Performance Management


Transportation Asset Management Case Studies
HERS-ST: The Indiana Experience

3. How did Indiana Get There?

Figure 5: The I-70 ramp west of Indianapolis, a Fast Track project.
The I-70 ramp west of Indianapolis, a Fast Track project.
Photo courtesy of INDOT

After months of work with the systems consultant, Indiana finalized the HERS-IN software in 1998. The customized version was congestion-based and included a process to convert the State's road inventory database to HPMS for HERS-IN. The result? Indiana finally had a 100 percent database for the 12,000 miles of the State jurisdictional system and didn't have to rely on sample data when evaluating the State's long-range needs.

The customized software contained several other special features, including an override element that allowed software-generated improvements to be replaced with analyst-specified improvements; the ability to produce maps; and the capability to evaluate capacity expansion projects and estimate the impact of each capacity improvement on traffic system-wide.

With HERS-IN in place, INDOT began looking at the larger picture - developing systems analysis programs that would generate a project-specific long-range plan. The State quickly discovered that it needed a suite of tools to make that goal a reality. Those tools include the following:

  • Indiana Statewide Travel Demand Model (ISTDM). INDOT's ISTDM is the cornerstone for the State's various systems planning tools, including HERS-IN. The model is used to provide the analytical framework for assessing transportation system performance and deficiency analysis, long-range plan development and systems-level project analysis, as well as the spatial analytical framework for many of the DOT's management systems.
  • Traffic Forecasting Tool (TFT). First developed in 1998, the TFT provides link-based travel forecasts for Indiana's State jurisdictional system. Link-based information is then displayed on a graph showing forecasted volume, available capacity and level of service (LOS).
  • Major Corridor Investment Benefit Analysis System (MCIBAS). Initiated in 1995, MCIBAS offers benefit-cost analysis of system alternatives in INDOT's ISTDM, including evaluation of corridor-level economic development benefits. The MCIBAS process uses the ISTDM to measure the direct impact of a major highway improvement on existing and future traffic volumes, speeds and distances. MCIBAS also includes a post processor that converts the travel demand impacts into dollar values for travel time, travel cost and safety benefits.

"You can do a full needs analysis in HERS-ST," Smith states, "but you still need to use all your tools."

PDF files can be viewed with the Acrobat® Reader®
Updated: 05/26/2015
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000

All Federal Highway Administration (FHWA) information technology systems will be unavailable, Friday, October 28, at 10:00 p.m. to Sunday, October 30, at 11:59 p.m., EDT, while work is being performed on the network. During that time, users will not be able to access any FHWA systems.

If you have any questions or problems, please contact the 5-Help Service Center @ (866) 466-5221 or 5-HelpServiceCenter@dot.gov.