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IV-1 SECTION IV Index of Strategies by Implementation Timeframe and Relative Cost Exhibit IV-1 classifies strategies according to the expected timeframe required for implementation and the relative cost to implement and operate each strategy for this emphasis area. In several cases, the implementation time will depend on such factors as the agencyâs procedures, the number of stakeholders involved, and the presence of any controversial situations. The range of costs may also vary somewhat for some of these strategies because of many of the same factors. Placement in the table below is meant to reflect costs relative to the other strategies listed for this emphasis area only, rather than relative to strategies discussed in other guides in the NCHRP Report 500 series. The costs of the strategies are estimated on a project level. For programwide strategies, the costs are considered to be spread over multiple projects, as would realistically be the case for many of the strategies discussed in this guide. EXHIBIT IV-1 Classification of Strategies According to Expected Timeframe and Relative Cost Relative Cost to Implement and Operate Timeframe for Moderate Implementation Strategy Low Moderate to High High Short (<1 year) 19.1 B2âImprove visibility of work zone traffic â control devices 19.1 B3âImprove visibility of work zone â personnel and vehicles 19.1 B4âReduce flaggersâ exposure to traffic â 19.1 C2âImplement measures to reduce work â space intrusions (and limit consequences of intrusions) 19.1 D1âEnhance enforcement of traffic laws â in work zones 19.1 D2âImprove credibility of signs â 19.1 E1âDisseminate work zone safety â information to road users 19.1 E2âProvide work zone training programs â and manuals for designers and field staff 19.1 F4âImplement work zone quality â assurance procedures (i.e., safety inspections or audits)
SECTION IVâINDEX OF STRATEGIES BY IMPLEMENTATION TIMEFRAME AND RELATIVE COST IV-2 EXHIBIT IV-1 (Continued) Classification of Strategies According to Expected Timeframe and Relative Cost Relative Cost to Implement and Operate Timeframe for Moderate Implementation Strategy Low Moderate to High High Medium 19.1 A1âImprove maintenance and â (1â2 years) construction practices 19.1 A2âUtilize full-time roadway closure for â construction operations* 19.1 A3âUtilize time-related contract provisions â 19.1 A4âUse nighttime road work â 19.1 A5âUse demand management programs â to reduce volumes through work zones 19.1 B1âImplement ITS strategies to improve â safety 19.1 C1âEstablish work zone design guidance â 19.1 C3âImprove work zone safety for â pedestrians, bicyclists, motorcyclists, and heavy-truck drivers 19.1 D3âImprove application of increased â driver penalties in work zones 19.1 F1âDevelop or enhance agency-level â work zone crash data systems 19.1 F2âImprove coordination, planning, and â scheduling of work activities 19.1 F3âUse incentives to create and operate â safer work zones Long (>2 years) 19.1 A6âDesign future work zone capacity into â new or reconstructed highways * Costs of improvements on parallel routes may be significant.