速度取締表示オーストラリア

It warns that vehicle speeds may be measured or enforced on the road ahead or throughout a specified section.

No. A speed-limit sign establishes the maximum legal speed. A radar sign only warns that compliance with an applicable limit may be monitored.

Check the most recent speed-limit sign, variable sign, speed-zone sign or general limit applying to the road and vehicle category.

No. It does not normally change the existing limit. Drivers must nevertheless travel more slowly when traffic, visibility, weather or road conditions require it.

It may announce a permanent camera, a mobile-control area or a section where enforcement can occur. The exact meaning depends on the country and sign design.

No. Drivers should never rely on assumptions about whether equipment is operating and should respect the speed limit at all times.

A fixed speed camera is permanently installed at a particular location and measures the speed of passing vehicles.

A mobile speed camera is temporarily positioned in a police vehicle, trailer, roadside unit or another approved location.

Lidar uses laser pulses to measure the speed and position of vehicles. It may be used by police officers or in temporary automatic installations.

Average-speed enforcement records a vehicle at two or more points and calculates its average speed across the controlled section.

No. Average-speed enforcement considers the travel time across the complete measured section rather than speed at only one point.

Yes. Some systems monitor vehicle speed and whether a vehicle passes a red traffic signal.

No. Some authorities announce speed cameras, while others permit enforcement without advance warning. The rules differ between countries and regions.

Yes. The absence of a warning sign does not normally prevent police or authorised authorities from carrying out a lawful speed check.

The applicable limit remains a maximum rather than a target. Drivers must reduce speed whenever travelling at that limit would be unsafe.

No. Check your speed and reduce it smoothly when necessary. Sudden braking can cause a rear-end collision.

Only while remaining within the applicable limit and driving safely. The restriction may continue, and another camera or average-speed section may follow.

No. Passing a camera or radar sign does not end the applicable speed restriction.

A radar speed display measures an approaching vehicle and shows its current speed, sometimes with a colour, message or smiley symbol.

Not necessarily. Many displays are preventive devices intended to make drivers aware of their speed and may collect anonymous traffic statistics without issuing penalties.

No. The roadside display is generally informational. Drivers remain responsible for observing the vehicle’s speedometer and the legal speed limit.

Yes. The technical ability to measure a motorcycle and the method used to identify it depend on the enforcement equipment.

Yes. Modern systems may measure vehicles in one or more lanes and may distinguish between traffic directions or vehicle categories.

Yes. Heavy vehicles, buses, trailers or other vehicle categories may be subject to lower limits than passenger cars on the same road.

Release the accelerator and reduce speed smoothly and safely. Do not brake harshly or make an abrupt lane change.