Addressing Safety through Engineering Countermeasures
Addressing Safety through Engineering Countermeasures
Many engineering countermeasures may be applied to address contributing factors to crashes . The following provides high level crash contexts or crash types and the associated engineering countermeasures . Not all potential countermeasures are provided below , and analysts should refer to other resources as needed to address specific crash patterns at study locations . Engineering judgement should be used to select appropriate countermeasures . For detailed information about each of the countermeasures see Appendix B .
Nighttime Crashes
• Rumble Strips
• Increase Lighting / Improve Lighting
Technology
• Upgrade Signs with Fluorescent
Sheeting
• Retroreflective Backplates
• Spot or Corridor Lighting
• Speed Management - See " Speed Management "
• Variable Speed Limits ( VSL )
Wet Conditions
This section refers to crashes occurring during or shortly after inclement weather , when pavement is still not dry . Severe
crashes typically occur more often under wet conditions due to the slick roadway surface and limited visibility . These problems may be addressed through the implementation of both engineering countermeasures , included in this list , and non-engineering countermeasures , such as drainage and stormwater management improvements . Appendix C has a list of projects for drainage improvements .
• Drainage Review / Improvements
• High Friction Surface Treatment
• Upgrade Signs with Fluorescent
Sheeting
• Retroreflective Backplates
• Rumble Strips
• Speed Management - See " Speed Management "
Run-off Road Crashes
• Access Management
• Delineators , Reflectors , and / or Object Markers
• Relocate Select Hazardous Utility Poles
• High Friction Surface Treatment
• Create or Increase Clear Zone
• Curve Improvements
• Median Cable Barrier ( Head-On / Median Cross-Over Crashes )
• Raised Median Island ( Head-On / Median Cross-Over Crashes )
• Rumble Strips
• Safety Edge
• Shoulder Improvements
• Speed Management
Rear-End Crashes
• Advanced Dilemma Zone Detection
• Improve Sight Distance
COMPREHENSIVE SAFETY ACTION PLAN 39