Maximum and minimum speed limits serve different safety purposes on motorways. The maximum speed limit is the highest legal speed you are allowed to drive. The minimum speed limit (or minimum safe speed concept) is the lowest speed you should maintain so you do not create danger for faster traffic.
Maximum speed limit (upper cap)
- The legal maximum speed for that motorway section.
- Driving above it is speeding.
- Higher speeds increase stopping distance and crash severity.
Minimum speed (lower safety threshold)
- Driving too slow can disrupt traffic flow.
- It can cause sudden braking, risky overtaking, and rear-end collisions.
- Slow vehicles should keep left and avoid blocking lanes.
Simple example
- If maximum is 120 km/h and you drive 140 km/h ? speeding.
- If traffic is flowing safely and you drive extremely slow ? you may create danger.
Tip: Follow posted signs for maximum speed, and avoid driving so slowly that you force others into risky moves.
Key Points
- Maximum speed limit = legal upper cap.
- Minimum speed = lower safety threshold (too slow can be dangerous).
- Both are about safety: avoid overspeeding and avoid blocking traffic.
- Keep left if you are slower than traffic flow.
Frequently Asked Questions
What is the difference between maximum and minimum speed limits?
Maximum is the highest legal speed allowed. Minimum relates to not driving so slow that you create danger for faster traffic.
Can driving too slowly on a motorway be dangerous?
Yes. It can cause sudden braking, risky overtaking, and rear-end collisions.
How can I drive safely within both limits?
Follow posted maximum speed signs, match safe traffic flow, keep left if slower, and reduce speed in rain or fog.