Safety Improvement for National Highway G109

Beijing, China Show map

Introduction

A 96km stretch of the National Highway G109 in Beijing, China was upgraded with several engineering treatments in order to reduce fatalities and serious injuries. Overall the number of casualty crashes decreased by 75% after safety improvement.

The characteristics of the highway included sharp curves, long and steep downgrades, bad sight distance and a dangerous roadside. The design speed of the general environment is 40km/h; however, it is subject to an operating speed of 70-80km/h. Also around 35-56% (depending on location) of the AADT comprises heavy vehicles, indicating high truck volumes.

Treatments

A number of different treatments/upgrades were performed along the highway, as including

  • installation/upgrade of guard rails with wirerope or steel guard rails (where appropriate)
  • channelization of intersections
  • improved signage and linemarking such as using vibration markings and three-dimensional markings at high-speed segments
  • reflective road pavement markers for improved night time delineation
  • upgraded roadside drainage/shoulders and friction enhancement of road pavement surface
  • attention and consideration for sight distance on curves
  • provision of roadside rest stations to cater for fatigued drivers.

    The overall cost of the treatment to the National Highway G109 amounted to 1.4 million dollars.

    Safer Roads
    Estimated cost
    Casualty Reduction
    Delineation
    Low
    10-25%
    Intersection - Delineation
    Low
    10-25%
    Skid Resistance
    Low to medium
    25-40%
    Sight Distance (obstruction removal)
    Low to medium
    25-40%
    Roadside Safety - Barriers
    Medium
    40-60%
    Shoulder Sealing
    Medium
    25-40%
    Realignment - Horizontal
    High
    25-40%
    None recorded
    Safer People
    Estimated cost
    Casualty Reduction
    Fatigue Management
    Low
    60% or more

    Safer Roads

    Safer Roads
    Estimated cost
    Casualty Reduction
    Delineation
    Low
    10-25%
    Intersection - Delineation
    Low
    10-25%
    Skid Resistance
    Low to medium
    25-40%
    Sight Distance (obstruction removal)
    Low to medium
    25-40%
    Roadside Safety - Barriers
    Medium
    40-60%
    Shoulder Sealing
    Medium
    25-40%
    Realignment - Horizontal
    High
    25-40%

    Safer Vehicles

    None recorded

    Safer People

    Safer People
    Estimated cost
    Casualty Reduction
    Fatigue Management
    Low
    60% or more

    Did you know?

    Just a small reduction in vehicle speeds can dramatically increase the chance of a child surviving a collision.

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  • Treatment Summary

    Costs
    US$1.4m
    Treatment life
    20 years
    Casualty Reduction
    75%

    Related Crash Types

    Related Road Users