Safety Effects of Median Modification Using Quick Kurb (QK)

• Authored by:  Dr. Huaguo Hugo Zhou
• Co-authored by:  Peter Hsu
• Event:  2010 National Conference on Access Management

Conclusions & Recommendations

• Effective Temporary Median Treatment
• Construction: Shorter Time and Less Cost
• Safety Effects
• Reduction on Left-Turn Related Crashes
• Total Crashes: Reduced for most of applications except full median closure from bi-directional median opening
• Benefit/Cost Ratio
• Bi-directional Channelization: 8-12
• One-directional Channelization: 3-5

Limitations & Next Step

• Short “After Period” in the Study
• Several Months to Three Years
• Small Sample Size
• Naïve Before-After Study:
• No SPF for Bi-directional Left-Turn Bays

Next Step:

• More Crash Data Collection
• SPF for Bi-directional Left-Turn Bays