Preserve Infrastructure

Infrastructure Performance Measures
Historical Infrastructure Index
Infrastructure Index

Infrastructure Performance Measures

Pavement Condition

Data on pavement condition is collected every year.

Utah's roadway targets in fair or good condition: Low Volume 80%, High Volume 95%.

Bridge Condition

Bridge inspection is occurring year-round resulting in a frequency of every structure every two years. In March of each year, the BHI score of each structure inspected in the previous 12 months is updated. In March of each year, each structure is inspected and scored out of 100 using the Bridge Health Index (BHI).

The Bridge Health Index of the National Highway System (NHS), State, and Local Governments and Municipalities is tracked.

Automated Traffic Signal System Condition

These devices and signals are key infrastructure measurements to manage traffic, and provide a safe, and reliable movement of goods, services and people. The department tracks the health of these through ongoing preventative maintenance and performance monitoring.


This number is determined by the percentage of operational devices.

Target: 100 percent of devices in operation

Signal Condition

This number is determined through an annual assessment that includes all electronics and physical infrastructure.

Target: 100 percent of signals in average condition or above


Pavement Management

Under the philosophy, “good roads cost less,” UDOT manages more than 16,000 lane miles of pavement throughout the state. We take a proactive approach to preserve and rehabilitate these vital assets to avoid costly reconstruction treatments. Pavement is prioritized in two categories based on the volume of daily vehicle usage and the volume of freight:

  • High volume system: Interstate (such as I-15 or I-80), most of our National Highway System and other roads experiencing over 1,000 vehicles a day. These roads carry 98 percent of traffic so our goal is to maintain the current condition levels with over 60 percent in good condition and less than 5 percent in poor condition.
  • Low volume system: Includes roads primarily in the rural portions of our state with less than 1,000 vehicles a day. Our goal is to improve our current condition levels to previous levels with over 30 percent of mileage in good condition and less than 20 percent in poor condition.

Bridge Management

The condition of bridges in our inventory is the envy of the country. We strategically invest our funding to proactively preserve, rehabilitate and reconstruct our structures. UDOT uses the Bridge Health Index (BHI) which measures and tracks the overall structural condition of the three categories of bridges in our system.

National Highway System

National Highway System: Bridges along the Interstate Highway System and roads serving airports, rail or truck terminals, and other facilities.

State Owned Bridges

State Owned Bridges: These bridges are owned by the state and include pedestrian and rail bridges.

Locally Owned Bridges

Locally Owned Bridges: All bridges not owned by state and national system that carry traffic on public routes.

Signals & Advanced Traffic Management Systems

Ongoing monitoring of our traffic signals and advanced traffic management systems ensures consistent reliability and extends the life-cycle of these devices. This proactive approach determines if devices are in good working condition or when they need to be replaced, upgraded, or decommissioned.