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Pages 43-47

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From page 43... ... 43 Findings Primary objectives of this project were to identify countermeasures that state DOTs were using to prevent the occurrence of roadway departure crashes and to mitigate the severity of crashes should they occur. Within those overall objectives, the project was to identify the extent of countermeasure application, the effectiveness of the countermeasures, issues that could hamper their application, and research needed to address any concerns about their use. Read the entire page →
From page 44... ... 44 Practices for Preventing Roadway Departures Strategies for Preventing Roadway Departure Crashes and Severity The strategic approach to addressing roadway departure crashes is based on objectives or risk categories. The AASHTO Strategic Highway Safety Plan identified these as: 1. Read the entire page →
From page 45... ... Conclusions 45 The survey responses identified the following additional countermeasures: • Passing lanes: Alaska noted that passing lanes on rural two-lane roads (which are common in that state) helped with aggressive driving, which can lead to roadway departure crashes. Read the entire page →
From page 46... ... 46 Practices for Preventing Roadway Departures countermeasures that have been shown to be especially effective in reducing roadway departure crashes or crash severity include: • Shoulder, edge-line, and centerline rumble strips; • SafetyEdge; • High-friction surface treatments; • Cable median barriers; • Increasing clear zones; • Flattening side slopes; and • Increasing sight distances on curves. While these and other countermeasures have shown reductions in crashes or crash severity, there are other factors that influence their cost-effectiveness. Read the entire page →
From page 47... ... Conclusions 47 that may be required, such as wider edge lines or Lidar units along the roadway") is reflective of several of the state responses. Read the entire page →

From page 43...

... 43 Findings Primary objectives of this project were to identify countermeasures that state DOTs were using to prevent the occurrence of roadway departure crashes and to mitigate the severity of crashes should they occur. Within those overall objectives, the project was to identify the extent of countermeasure application, the effectiveness of the countermeasures, issues that could hamper their application, and research needed to address any concerns about their use.

Read the entire page →

From page 44...

... 44 Practices for Preventing Roadway Departures Strategies for Preventing Roadway Departure Crashes and Severity The strategic approach to addressing roadway departure crashes is based on objectives or risk categories. The AASHTO Strategic Highway Safety Plan identified these as: 1.

Read the entire page →

From page 45...

... Conclusions 45 The survey responses identified the following additional countermeasures: • Passing lanes: Alaska noted that passing lanes on rural two-lane roads (which are common in that state) helped with aggressive driving, which can lead to roadway departure crashes.

Read the entire page →

From page 46...

... 46 Practices for Preventing Roadway Departures countermeasures that have been shown to be especially effective in reducing roadway departure crashes or crash severity include: • Shoulder, edge-line, and centerline rumble strips; • SafetyEdge; • High-friction surface treatments; • Cable median barriers; • Increasing clear zones; • Flattening side slopes; and • Increasing sight distances on curves. While these and other countermeasures have shown reductions in crashes or crash severity, there are other factors that influence their cost-effectiveness.

Read the entire page →

From page 47...

... Conclusions 47 that may be required, such as wider edge lines or Lidar units along the roadway") is reflective of several of the state responses.

Read the entire page →

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