M7 Westlink Motorway

The Westlink M7 Motorway is a 40 kilometre four lane motorway serving Sydney's west. It links the Hills M2 at Baulkham Hills, the M4 at Eastern Creek and the M5/Hume Highway at Prestons. Westlink M7 is a fully electronic toll road with no toll booths and uses a distance based tolling system.

M7 travel times

Travel time information is available on the M7 motorway, from Baulkham Hills (Hils M2) to Prestons (M5).

The travel time system displays the estimated length of time it should take to reach upcoming motorway exits, based on the current traffic flow. Travel time estimates are updated every minute to reflect the current travel conditions and provide the most accurate estimates.

Travel time estimates are also updated and displayed at Live Traffic NSW.

If you are travelling on the M7 Motorway you will see the travel time estimates displayed on every second fixed electronic message sign. Typical travel time messages will include two upcoming exits with estimated times.

Displays will be similar to those in the image below.  For example, the image below shows the estimated time to travel from the message sign to the M4 motorway exit is 12 minutes and from the message sign to the M2 motorway is 24 minutes.

If there are delays caused by heavy traffic ahead, the travel time messages may be supplemented with delay messages on other electronic message signs not used for travel time, like the images below. The travel time estimates will be longer than usual reflecting the traffic conditions.

The electronic message signs that are not used for travel time may also show other information such as road work, tolling, special event or road safety messages.

If there are delays caused by a crash or other incidents, the electronic message signs will be used to communicate specific information about the incident or traffic conditions, rather than travel time estimates.

Frequently asked questions

  • The travel time system calculates estimates of how long it should take road users to reach certain motorway exits, based on the current traffic flow.

    For example, the image below shows the estimated time to travel from the message sign to the M4 motorway exit is 12 minutes and from the message sign to the M2 motorway is 24 minutes.

  • The travel time system displays the estimated length of time it should take to reach upcoming motorway exits, based on current traffic flow. Travel time estimates are updated on electronic message signs to reflect current travel conditions and provide the most accurate estimates. Typical travel time messages include major upcoming exits with estimated times.
  • The technology on the M7 works with regularly spaced in-road loops that detect vehicle speeds. Every minute a computer averages these speeds for the previous three minutes and sums up the time to travel along various sections of the M7. This average time to cover a distance is referred to as ‘current traffic flow’.
  • There are more than 150 in-road loops on the M7 spaced at about 500 metres to provide travel time estimates for road users in both directions.
  • The tolling gantries are not used for the travel time display system as they are not designed for this purpose and are not suitably located to provide real time information.
  • Estimated travel times are refreshed and displayed on the M7 motorway electronic message signs every minute.
  • The M7 travel time system operates 24 hours a day, seven days a week.
  • If there is an incident on the M7 which causes a significant impact on traffic flow, road conditions or safety, the electronic message signs will be used to communicate specific information about the incident or traffic conditions, rather than travel time estimates.
  • No, the M7 travel time system uses the in-road loops to detect travel speeds. It does not use tag information collected by the toll gantries.
  • Every second electronic message sign is not used for travel time display and may appear blank if no other messages are being shown.

    The travel time signs may appear blank during routine maintenance or if there has been a power or equipment failure or during repair. In these cases an adjacent electronic message sign may be used to display travel times.

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