A composite metric for infrastructure is based on the following key performance measures:
• Bridges (39%)
• Pavement (35%)
• Signals (17%)
• Advanced Traffic Management System (ATMS) (9%)
How are we doing?
Through a proactive asset management approach, the overall conditions of bridge and pavement systems continue to improve. The gas tax enacted in 2016 will allow us to invest in strategic enhancement of our low volume roads and bridge systems, demonstrating that, "good roads cost less."
We apply the same philosophy to the management of our ATMS and signal system. We're improving our data collection and life-cycle cost planning as the size of our systems grow.
- Pavement management
- Bridge management
- ATMS and signal system management
We manage more than 16,000 lane miles of pavement throughout the state with the philosophy that “good roads cost less." We want to provide the best road pavement condition with the greatest long-term benefit as possible through preservation, rehabilitation and reconstruction.
Pavement is managed using two systems based on the volume of daily vehicle usage and our pavement management strategy:
- High volume system: Includes Interstate, most of our National Highway System and other roads with over 1,000 vehicles a day. Because these roads carry 98 percent of traffic, our goal is to maintain current condition levels with over 60 percent in good condition and less than 5 percent in poor condition.
- Low volume system: Includes roads lying 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.
Click on map image to access a live interactive map.
The condition of bridges in our inventory is the envy of the country. We strategically invest funds on a combination of structures preservation, rehabilitation and reconstruction projects.
We track multiple statistics related to bridge health. In 2016, we began classifying structural condition based on the Bridge Health Index (BHI), as opposed to the previously used Sufficiency Rating. While it appears that all groups of structures showed a significant decrease in condition between 2016 and 2017, the decrease is actually based on the changes in inspection and reporting procedures that better characterize the actual condition.
- National Highway System: This category includes all bridges carrying National Highway System (NHS) routes. The NHS includes major roadways such as the Interstate Highway System and roads serving airports, rail or truck terminals and other strategic transport facilities.
- State Owned Bridges: This system includes all state owned bridges not on the National Highway system. This includes pedestrian and rail bridges crossing state routes and local routes crossing interstate routes.
- Locally Owned Bridges: This category includes all bridges not owned by state agencies that carry traffic on public routes.
ATMS and Signal System
UDOT is adopting a complete lifecycle approach to ATMS devices and traffic signal management to achieve system reliability. This proactive approach includes determining the end-of-life for each device to determine when service will be needed to replace, upgrade or decommissioned as well as the number in good working condition.
UDOT is focused on preserving infrastructure by establishing targets for each strategy:
- 80% of all pavement is in good or fair condition
- Bridges: Out of a BHI score of 100, each category has an individualized target:
- NHS is 85
- State is 80
- Local is 75
- ATMS: 95 percent of devices in operation
- Signal System: 95 percent of signals in average or above average condition
Data on pavement condition is collected every other year, the last being in 2015. The goal for pavement condition on Utah's highways is 80% good or fair.
Bridge inspection is occurring year-round resulting in a frequency of every structure every two years. In March of each year, the BHI of each structure inspected in the previous 12 months is updated.
NHS State Local
ATMS and Signals
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.
ATMS Percent Operational
This number is determined by the percentage of operational devices.
This number is determined through an annual assessment that includes all electronics and physical infrastructure associated with signals.