Head-On Collisions

Index of Strategies by Implementation Timeframe and Relative Cost

Exhibit IV-1 classifies strategies according to expected timeframe and relative cost. In general, implementation time will depend upon such factors as the agency's processes and procedures for planning and programming and project development, the length of roadway involved, the need for additional right-of-way, and the need to complete environmental reviews and approvals. The range of costs may also vary somewhat for some of these strategies because of many of the same factors. A strategy's placement in the exhibit is meant to reflect its most common expected application under normal circumstances.

EXHIBIT IV-1
Classification of Strategies According to Expected Timeframe and Relative Cost

		Relative Cost to Implement and Operate
Timeframe for Implementation	Strategy	Low	Moderate	Moderate to High	High
Short (<1 year)	18.1 A1—Install centerline rumble strips for two-lane roads
	18.1 A2—Install profiled thermoplastic stripes for centerlines
	18.1 A4—Provide center two-way left-turn lanes for four- and two-lane roads
Medium (1­2 years)	18.1 A5—Reallocate total two-lane roadway width (lane and shoulder) to include a narrow "buffer median"
	18.1 B1—Use alternating passing lanes or four-lane sections at key locations*
	18.1 B2—Install median barriers for narrow-width medians on multilane roads
Long (>2 years)	18.1 A3—Provide wider cross sections on two-lane roads*
*If additional right-of-way is required, this strategy could become a high-cost strategy.