Lane Change

Lane change crashes occur when one vehicle attempts to change lanes and collides with another vehicle travelling in the same direction. This crash type is most common on higher volume multi-lane roads (such as motorways and urban arterial roads).

It is also common where there is roadside activity (such as roadside markets or locations where public transport vehicles pick up and drop off passengers).

The severity of the collision between the vehicles is often low, due to low relative speeds. However, if vehicles or road users of different size collide, the consequences can be very severe (e.g. motorcyclist and car, car and truck).

Some of the driver related contributing factors to this crash type are:

  • fatigue
  • inattention
  • alcohol/drugs/medication impairment
  • information overload (too many driving decisions to be made at once)
  • lack of familiarity with the route
  • poor visibility, including ‘blind spots'.

Road related causes include:

  • unexpected or poor lane drop-offs or merge areas
  • roadside activity
  • poor directional signs or lane markings.
Safer Roads
Estimated cost
Casualty Reduction
Central Turning Lane Full Length
Low
10-25%
Delineation
Low
10-25%
Intersection - Delineation
Low
10-25%
Parking Improvements
Low to medium
10-25%
Regulate Roadside Commercial Activity
Low to medium
10-25%
Intersection - Turn Lanes (Signalised)
Low to medium
10-25%
Intersection - Turn Lanes (Unsignalised)
Low to medium
10-25%
Motorcycle Lanes
Medium
25-40%
Speed Management
Medium
25-40%
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
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
Central Turning Lane Full Length
Low
10-25%
Delineation
Low
10-25%
Intersection - Delineation
Low
10-25%
Parking Improvements
Low to medium
10-25%
Regulate Roadside Commercial Activity
Low to medium
10-25%
Intersection - Turn Lanes (Signalised)
Low to medium
10-25%
Intersection - Turn Lanes (Unsignalised)
Low to medium
10-25%
Motorcycle Lanes
Medium
25-40%
Speed Management
Medium
25-40%
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
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?

If provided with overtaking lanes, drivers will be less likely to make dangerous overtaking attempts.

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