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Traffic Operation Assessment Systems Tool (TOAST)

ODOT’s mission is to provide easy movement of people and goods from place to place.  In order to continue this mission, Ohio is currently undergoing a shift in focus toward a more operationally centered mindset for our transportation system.  Through our Transportation Systems Management and Operations (TSMO) plan and program, we are working to maximize the efficiency and safety of our current transportation network.

In an effort to make data-driven decisions and determine operationally sensitive corridors throughout the state, we have developed the Traffic Operations Assessment Systems Tool (TOAST).

About TOAST Data Calculations

  • Routes are segmented into the State Priority System with breaks at the urban area boundaries, interchange center points, and road functional class changes. Where possible, data is provided directionally.
  • Multiple data categories make up TOAST. For each category, data ranges were normalized into values of 0-10, then multiplied by a weighting factor.
  • The total score for a route is calculated as a percent based on the score for each category divided by the total possible maximum score. 

In general, the higher the percent, the better the route is performing; whereas, the lower the percent, the more likely a route is to benefit from application of TSMO strategies.

TOAST Data Category Descriptions

BOTTLENECKS

A potential bottleneck is detected when speeds on a segment drop to 65% of reference speeds and cause at least a two-minute delay.

PASS-THROUGH:
any part of the bottleneck(s) impacts the corridor

ORIGINATION:
the bottleneck(s) begins in the corridor

TRAVEL TIME

TRAVEL TIME PERFORMANCE:
Percent of time motorists can travel at or near (90%) of free-flow speed

TRAVEL TIME INDEX:
Ratio of the travel time during specific time of day periods to the time required to make the same trip at free-flow speeds

TSMO SAFETY

REAR END PERCENT:
Percent of total crashes that are rear end

CRASH SEVERITY IMPACT:
Impact of crashes based on severity

TRAFFIC INCIDENT MANAGEMENT

INCIDENT CLEARANCE:
The time from report of an incident until the entire scene is cleared.

SECONDARY CRASHES:
Percent of crashes that occurred as a result of a previous incident.

TRAFFIC VOLUME DATA

VOLUME PER LANE:
Volume of traffic per lane, calculated based on a weighted average for each segment.

FREIGHT CORRIDORS:
Weighted average of percent trucks (avg. daily truck volume ÷ avg. daily total volume).

 

See TOAST Reference Sheet

Online TOAST Ratings Map

View Larger Map

2022 TOAST Reports

2021 TOAST Files are not available

2020 TOAST Archives

2019 TOAST Archives

2018 TOAST Archives