Speed limits

Mum and baby

Speeding is dangerous, and speed limits are in place to protect drivers.

Always drive at a speed safe for the road and weather conditions, but don’t go over the speed limit.

There are big fines, and demerit points, if you’re caught speeding by the police. Worse, you could injure yourself, your passengers, or other road users. Think about how you'll feel if you cause a bad crash. Don’t risk it.

You can see South Australian speed limits here on the My Licence website.

  • Travel at a speed safe for the road and weather conditions. The slower you travel, the more time you’ll have to react to avoid a crash.
  • Extreme weather such as strong winds, storms, dust, fog and ice make driving more difficult. Slow down. It’s much safer.
  • Remember that other road users find it difficult to judge how fast you’re travelling. Slow down if you think there’s any danger of a crash.
  • The speed limit shown on road signs is the maximum speed you should travel, but sometimes it’s best to travel below the speed limit to stay safe.
  • Speeding is the biggest killer of young drivers. Around 80% of those killed are male.
  • Driving at 100km/h rather than 110km/h will take no more than 3 or 4 minutes extra time and mean that you’re much less likely to be in a crash.
  • About two thirds of crashes where people are injured or killed happen on roads with a speed limit of 100 or 110km/h.
  • Around 30% of all crashes are rear-end crashes. Watch your distance, and your speed, when you’re behind other cars.
  • Speed is a key factor in crashes. As your speed increases, your ability to react to emergencies decreases.
  • For road users with little protection - like people walking or on bicycles - small differences in your speed can mean the difference between life and death. Death or serious injury can happen even at quite low speeds.
  • 50km/h is the maximum default speed limit in towns and cities.
  • 100km/h is the maximum speed limit on most rural roads in South Australia.
  • At least 35% of deaths on South Australian roads each year are speed related.
  • Fixed (permanent) and mobile speed cameras operate throughout South Australia. These cameras improve road safety by checking that people are driving at safe speeds, and following the road rules.