Roadway Departure Safety: A Manual for Local Rural Road Owners

Description of Figure 1 (Continued). Steps to Address Roadway Departure Safety

Step 3: Analyze Data (Manual: Section 3), Approach: Spot Location Approach and Systematic Approach (Crash Type Focus)

Data can be analyzed in the following ways, based on available information:

• Crash frequency
• Crash rate calculations
• Qualitative analysis

Step 3: Select Countermeasures (Manual: Section 4), Approach: Systematic Approach (Countermeasure Focus)
Develop a list of countermeasures and thresholds for their application (e.g., crash frequency, crash type, traffic volumes).

Step 4: Select and Install Countermeasures (Manual: Section 4), Approach: Spot Location Approach and Systematic Approach (Crash Type Focus)

Details from crash data and analysis feed the countermeasure selection process.

• Warning signs and curve delineation
• Pavement markings and RPMs
• Rumble strips
• Other

Step 4: Analyze Data and Install Countermeasures (Manual: Section 3 and 4), Approach: Systematic Approach (Countermeasure Focus)

• Search crash data for the criteria identified in Step 3.
• Determine cost-effective level of deployment for each countermeasure.

Step 5: Assessment and Follow-up (Manual: Section 5)

Evaluate roadway departure safety treatments after installation.

• Track countermeasure installation
• Monitor crash experience at treated locations