Example Intersection Safety Implementation Plan

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Summary

The number of intersection fatalities and incapacitating injuries within the State can measurably decline over the next several years, but it will take a number of new and special actions, increased intersection safety emphasis, and additional funding to realize this benefit. The existing approach of emphasizing moderate- to high-cost improvements at high-crash intersections must be complemented with the deployment of a large number of low-cost, effective countermeasures and the use of coordinated 3E comprehensive solutions on high-crash corridors and in municipalities that have a high number of intersection fatalities.

For many of the countermeasures, key implementation steps include field reviews to determine the specific intersections at which improvements can be made. Appendix A provides information that can facilitate this process – listings of intersections where multiple countermeasures can be considered.

A consensus-building process must be pursued to gain the broad support and funding of Districts, MPOs, cities, and upper management of the implementation plan to better ensure effective implementation. In addition, one of the existing safety committees should guide the effective implementation of the plan. This will also improve the potential for a successful outcome.

Recapping, the countermeasures, deployment levels, costs, and estimated lives saved needed to achieve the intersection safety goal are shown in Table 36. While the level and direction of effort is well beyond that currently being pursued for intersection safety, the expected outcome – preventing over 5,400 crashes, 300 incapacitating injuries, and more than 25 fatalities at State intersections each year – is worth the investment.

Table 36. Summary of Countermeasures, Deployment Levels, Costs, and Fatality Reductions
Countermeasure Approach Number of Intersections to be Improved Construction Cost
($ Million) 		Enforcement, Education and EMS Costs (Annual $ Thousand) Estimated Annual Crashes Reduced Estimated Annual Incapacitating Injuries Reduced Estimated Annual Fatalities Reduced
Basic Set of Sign and Marking Improvements – State Stop-Controlled Intersections Systematic 1,108 8.87 empty cell 1,382 117.7 13.07
Flashing Solar Powered LED Beacons on Advance Intersection Warning Signs and STOP Signs or Flashing Overhead Intersection Beacons – State Stop-Controlled Intersections Systematic 69 0.69 empty cell 54 4 0.44
J-Turn Modifications on High-Speed Divided Arterials – State Stop-Controlled Intersections Systematic 56 16.8 empty cell 77 17.5 2.87
Basic Set of Sign and Marking Improvements – Local Stop-Controlled Intersections Systematic 236 1.89 empty cell 555 15.1 0.71
Basic Set of Signal and Sign Improvements – State Signalized Intersections Systematic 395 1.92 empty cell 789 28.1 1.52
Change of Permitted and Protected Left-Turn Phase to Protected Only – State Signalized Intersections Systematic 536 2.67 empty cell 819 44 1.49
Advance Detection Control Systems – State Signalized Intersections Systematic 67 1 empty cell 45 4.2 0.31
Basic Set of Signal and Sign Improvements – Local Signalized Intersections Systematic 263 2.63 empty cell 670 19.5 1.51
Change of Permitted and Protected Left-Turn Phase to Protected Only – Local Signalized Intersections Systematic 387 1.94 empty cell 623 23.7 1.27
New or Upgraded Lighting – State Rural Intersections Systematic 64 3.84 empty cell 49 8.4 1.08
High-Friction Surface – State Intersections Systematic 53 2.65 empty cell 86 11.3 1.27
Enforcement-Assisted Lights Systematic 1 City 0.09 0.05 45 2.3 0.11
Corridor 3E Improvements on High-Speed Arterials with Very High Frequencies of Severe Intersection Crashes Comprehensive 3 Corridors 6 0.3 83 7.5 1.25
Municipal-Wide 3E Improvements in Municipalities with High Frequencies of Severe Intersection Crashes Comprehensive 1 City 1 0.1 383 6.6 0.57
Roundabouts Traditional 3 2.4 empty cell 32 3 0.36
Total empty cell empty cell 54.39 0.45 5,692 312.9 27.83

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