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Other Reference Information <br />Currently the CMF Clearinghouse has only one reference for ped/vehicle collisions which indicates an <br />increase in crash likelihood. However, a majority of references for all crash types show a decrease in collisions. <br />See additional reference: FHWA Manual for Selecting Safety Improvements on High Risk Rural Roads <br />Traffic signals at intersections control the flow of traffic by <br />assigning right-of-way to different movements at different times. <br />Some traffic signal phasing is more effective at reducing the <br />likelihood of severe injury collisions. For example, protected <br />left-turn signal phasing reduces the likelihood of severe left-turn <br />collisions more effectively than permitted left-turn signal phasing. <br />Cost $$$ <br />LRSM ID NS03 <br />INTERSECTIONS & ROADWAYS <br />Manage Conflicts <br />in Time <br />SAFE SYSTEM HIERARCHY <br />Signal <br />Tier 1 Tier 2 Tier 3 Tier 4 <br />Other Reference Information <br />FHWA Manual for Selecting Safety Improvements on High Risk Rural Roads <br />Superelevation is the rotation of the pavement on the approach <br />to and through a horizontal curve and is intended to assist the <br />driver in negotiating the curve by counteracting the lateral <br />acceleration produced by tracking. In other words, the road <br />is designed so that the pavement rises as it curves, offsetting <br />the horizontal sideways momentum of the approaching <br />vehicle. Superelevation can help vehicles stay on the roadway. <br />Superelevation can also inadvertently make it easier for drivers <br />to drive at higher than desirable speeds. Consider the target or <br />desired speed for a roadway and relevant design guidance when <br />selecting appropriate superelevation. <br />Cost $$ <br /> <br />INTERSECTIONS & ROADWAYS <br />SAFE SYSTEM HIERARCHY <br />Remove Severe <br />Conflicts <br />Superelevation at <br />Horizontal Curve Locations <br />Tier 1 Tier 2 Tier 3 Tier 4 <br />Signal Superrelevation at Horizontal Curve Locations <br />20 Appendix J: Countermeasures Toolbox | Snoqualmie Pass Comprehensive Safety Plan | Kittitas County