You may not be aware, but you can be fined for driving too slowly and cautiously. In some situations, this can be as dangerous as speeding as it increases the risk of congestion, especially in tunnels or fast-moving traffic, and can lead to tailgating. Certain roads will display minimum speed limits and just like maximum speed limits must be adhered to – so make sure you recognise the signs. They are marked by a blue, circular sign containing the minimum speed limit in white. The end of the minimum speed limit is signalled by the same sign with a red line through it.