Drivers have lots of things to be aware of on the roads, with signs and signals all around.
But speed cameras are one of the main things motorists keep a keen eye out for.
The penalties for speeding can be extreme - with points on your licence and a costly fine all possible, for driving over the advertised limit.
With cameras becoming smarter all the time - to help keep our roads safe - it's important that drivers know all the ways they can be caught speeding.
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There are 12 kinds of speed camera in use in Merseyside, so we decided to round them up below - along with how they work, so you don't get caught out.
Here's all the speed cameras drivers need to know about.
1. Motorway Average Speed Cameras
These tend to be used during roadworks - such as those on the M62 - rather than all the time.
They're different to normal motorway cameras.
They record your speed between two points and calculate an average of your speed overall.
2. Overhead Smart Motorway cameras
Despite the name these can be overhead or on the floor.
But they only trigger when you speed past them - different to average speed cameras.
They used to only be switched on when the overhead signs are on, but the new Smart ones can catch anyone at any time.
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3. Handheld speed guns
These are used by police or volunteers at the side of the residential roads.
The RADAR speed devices capture the speed of any passing car.
They are highly visible patrols and anyone caught speeding can be issued with a ticket.
4. Floor-Based Motorway Speed Cameras
These work in the same way as overhead cameras, but are positioned on the floor.
They don't tend to be used widely these days but they trigger when driven past at high speed.
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5. Gatso speed cameras
These are the 'classic' standard speed cameras which have been on roads since the 1990s.
They are rear facing and capture the car and number plate when driven past fast enough to trigger it.
6. Non-motorway average speed cameras
On normal roads these cameras can be in place permanently.
They record how long it takes you to drive between two points, to work out if you were going too fast.
7. Truvelo forward facing speed cameras
These are similar to the classic speed camera but they face forwards.
They only trigger when a vehicle goes past them faster than the speed limit for that road.
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8. Onboard police vehicle cameras
Police cars can record your speed as they travel behind you.
On-board computers and cameras can sit behind you and track your car's position relative to nearby objects like lampposts and work out how fast you're going.
9. The Long Ranger
This is a new type of mobile speed gun which can capture your car speeding up to a mile away.
It's not in use everywhere yet but there are plans to roll it out soon.
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10. Police van cameras
These work similarly to mobile speed guns.
The vans park up on roadsides and can catch anyone speeding past.
11. Red X cameras
These aren't actually speed cameras but drivers need to know about them.
Red X cameras can now capture your car and trigger a fine if you drive under a camera while a lane has been closed on a smart motorway.
12. Infrared Night time speeding sensors
These are infrared sensors which can capture your number plate in the dark.
They are used in conjunction with speed cameras to make sure you can't speed even in the pitch black.
