Preservation projects with category 1 and 2 segments have a “pave mainly” focus. Using Preservation funds, mandatory design features must be incorporated as per the ODOT Highway Design Manual and low-cost safety mitigation measures may be considered. Typically Safety funds would not be used on these projects unless there is a high priority SPIS site within the project limits. Fewer safety features are designed into these projects because of the lack of recorded history of safety problems.
Preservation projects with category 3, 4, and 5 segments must be reviewed for possible countermeasures to improve safety. Designers should review the segment for high priority SPIS locations within the segment. They should also review possible countermeasures for the prevailing type(s) of crashes in the segment and estimate the benefit/cost ratio for the possible countermeasures. This ensures that improvements with the greatest payback in crash prevention are considered. Countermeasures in SIP Category 4 or 5 segments are eligible for Highway Safety Program funding even if the benefit/cost analysis does not meet the minimum ratio of 1.0. SIP Category 3 segments require a benefit/cost ratio of 1.0 or greater. See the Highway Safety Program Guide
for further information and criteria for Highway Safety funding.