A composite metric for zero fatalities is based on key performance measures. The individual criteria are weighted as follows:
Historical data for optimize mobility is limited in comparison to the other two strategic goals. We have fewer years of available data and the information displayed is limited to I-15 along the Wasatch Front.
Previously, delay data was expensive and difficult to collect. With new technologies, greater volumes and accuracy of data are available across the system. Reliability is an emerging performance measure nationally, and we have established new measures for mode split and snow and ice removal. We are in the process of establishing baseline data for this index.
Through a data driven prioritization process, capacity projects are selected that add new lanes or roads to the state’s roadway system. Improvements can include major capacity projects and chokepoint projects.
With Utah’s population expected to double by 2040, it is important that UDOT help the traveling public make more informed decisions and work with community partners and agencies to improve access to travel choices. We seek solutions that fit community, environmental and economic needs to improve mobility through a reducing congestion on our roadways and extending the life of our assets.
Informing the Public of potential impacts and delays, as well as sharing safety messages.
When winter storms occur, the public, businesses, and the economy are dependent on clear roads to safely travel to their destinations. We operate a fleet of more than 500 snowplows to manage an average of 25 winter storms and remove more than 65 million tons of snow and ice on Utah’s roads. UDOT continues to make the snow and ice removal process more efficient by:
Offering alternative modes of transportation will improve mobility on roadways and extend the life of our assets. By working with our community partners, we encourage and facilitate the development of an integrated transportation system that fit community, environmental, economic and transportation conditions.
The TravelWise program encourages residents to rethink the way they travel to reduce congestion on roadways. Actions such as shifting travel times to avoid primary commute periods, taking transit, or combining errands also known as trip chaining.
Delay is defined as the additional travel time experienced by a driver, passenger or pedestrian, due to circumstances that impede the desirable movement of traffic such as bottlenecks, car accidents or weather conditions. It is measured as the time difference between congested travel time, the travel time at 50 mph, which is the optimal speed to maximize traffic flow.
Today, the performance measures for delay and reliability are for I-15 in urbanized areas. In the future, we will be able to show these on a full system basis.
The four reliability categories listed in the graphs below are determined by comparing the average speed of vehicles (50 mph) and extra time required for travelers to ensure on-time arrival 95% of the time, also known as Buffer Time Index (BTI).
The graph on Mode Split below shows person trips from current volumes and UTA ridership as percentage of goal in Salt Lake County I-15 corridor during PM peak period. The normalized mode split score on the graph is determined by the dividing the percentage of transit ridership by the target of 10 percent. The maximum normalized mode split value is 100.
The pie chart on Snow and Ice Removal Efficiency shows how effectively UDOT was able to remove snow and ice from roadways around the state in 2017. Additional information on current road conditions can be found on the UDOT Traffic Website.
The bar on Snow and Ice Removal on a month to month basis compares snow and ice removal since November 2015. The graph compares Snow Removal over two winters.