Intersections

Intersection crashes are one of the most common types of crash problem, particularly in urban areas. In rural areas, or where vehicle speeds are high, the consequence of collisions at intersections can be particularly severe.

The chances of avoiding serious injury or death reduce dramatically above 50 km/h for side impacts for the most modern types of cars, and is far less than this for older vehicles, and particularly for vulnerable road users.

A number of different intersection crash types can occur, including:

  • Collision between oncoming vehicles, particularly when one is turning across traffic
  • Right-angle collisions, where neither vehicle is turning (often occurring at high speed)
  • Right-angle or side-swipe collisions where one or more vehicles are turning
  • Rear-end crashes

There are a number of causes of intersection crashes, including:

  • Inadequate sight distance to on-coming vehicles
  • High approach speeds
  • Lack of intersection visibility (road users are not aware of the intersection)
  • Lack of gaps in traffic
  • Complex intersection layout
  • Poor road surface condition
Safer Roads
Estimated cost
Casualty Reduction
Delineation
Low
10-25%
Intersection - Delineation
Low
10-25%
Intersection - Turn Lanes (Signalised)
Low to medium
10-25%
Intersection - Turn Lanes (Unsignalised)
Low to medium
10-25%
Parking Improvements
Low to medium
10-25%
Skid Resistance
Low to medium
25-40%
Speed Management
Medium
25-40%
Railway Crossing
Medium
60% or more
Intersection - Signalise
Medium
25-40%
One Way Network
Medium
25-40%
Intersection - Roundabout
Medium to high
60% or more
Traffic Calming
Medium to high
25-40%
Intersection - Grade Separation
High
25-40%
Safer Vehicles
Estimated cost
Casualty Reduction
Vehicle Features and Devices
Low
60% or more
Motor Vehicle Standards
Low
60% or more
Used Car Safety Ratings
Low
60% or more
Vehicle Roadworthiness
Low
60% or more
New Car Assessment Program (NCAP)
High
25-40%
Safer People
Estimated cost
Casualty Reduction
Enforcement
Low
60% or more
Addressing Alcohol and Other Drugs
Low
60% or more
Education
Low
60% or more
Child Safety Initiatives
Low
60% or more
Fatigue Management
Low
60% or more
Helmets and Protective Clothing
Low
60% or more
Seatbelts
Low
60% or more
Safe Speed
Low
60% or more
Publicity
Low
60% or more
Licensing
Medium
40-60%

Safer Roads

Safer Roads
Estimated cost
Casualty Reduction
Delineation
Low
10-25%
Intersection - Delineation
Low
10-25%
Intersection - Turn Lanes (Signalised)
Low to medium
10-25%
Intersection - Turn Lanes (Unsignalised)
Low to medium
10-25%
Parking Improvements
Low to medium
10-25%
Skid Resistance
Low to medium
25-40%
Speed Management
Medium
25-40%
Railway Crossing
Medium
60% or more
Intersection - Signalise
Medium
25-40%
One Way Network
Medium
25-40%
Intersection - Roundabout
Medium to high
60% or more
Traffic Calming
Medium to high
25-40%
Intersection - Grade Separation
High
25-40%

Safer Vehicles

Safer Vehicles
Estimated cost
Casualty Reduction
Vehicle Features and Devices
Low
60% or more
Motor Vehicle Standards
Low
60% or more
Used Car Safety Ratings
Low
60% or more
Vehicle Roadworthiness
Low
60% or more
New Car Assessment Program (NCAP)
High
25-40%

Safer People

Safer People
Estimated cost
Casualty Reduction
Enforcement
Low
60% or more
Addressing Alcohol and Other Drugs
Low
60% or more
Education
Low
60% or more
Child Safety Initiatives
Low
60% or more
Fatigue Management
Low
60% or more
Helmets and Protective Clothing
Low
60% or more
Seatbelts
Low
60% or more
Safe Speed
Low
60% or more
Publicity
Low
60% or more
Licensing
Medium
40-60%

Did you know?

Pedestrian overpasses can reduce casualty crashes by 60% or more.

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