| A dual carriageway is a road which has a central reservation to separate the carriageways. |
| 137) | On a two-lane dual carriageway you should stay in the left-hand lane. Use the right-hand lane for overtaking or turning right. After overtaking, move back to the left-hand lane when it is safe to do so. |
| 138) | On a three-lane dual carriageway, you may use the middle lane or the right-hand lane to overtake but return to the middle and then the left-hand lane when it is safe. |
| 139) | Climbing and crawler lanes. These are provided on some hills. Use this lane if you are driving a slow-moving vehicle or if there are vehicles behind you wishing to overtake. Be aware of the signs and road markings which indicate the lane is about to end.
|
| 140) | Cycle lanes. These are shown by road markings and signs. You MUST NOT drive or park in a cycle lane marked by a solid white line during its times of operation. Do not drive or park in a cycle lane marked by a broken white line unless it is unavoidable. You MUST NOT park in any cycle lane whilst waiting restrictions apply. Law RTRA sects 5 & 8 |
| 141) | Bus lanes. These are shown by road markings and signs that indicate which (if any) other vehicles are permitted to use the bus lane. Unless otherwise indicated, you should not drive in a bus lane during its period of operation. You may enter a bus lane to stop, to load or unload where this is not prohibited. |
| 142) | High-occupancy vehicle lanes and other designated vehicle lanes. Lanes may be restricted for use by particular types of vehicle; these restrictions may apply some or all of the time. The operating times and vehicle types will be indicated on the accompanying traffic signs. You MUST NOT drive in such lanes during their times of operation unless signs indicate that your vehicle is permitted (see ‘Information signs’).
Vehicles permitted to use designated lanes may or may not include cycles, buses, taxis, licensed private hire vehicles, motorcycles, heavy goods vehicles (HGVs) and high-occupancy vehicles (HOVs). Where HOV lanes are in operation, they MUST ONLY be used by
 | vehicles containing at least the minimum number of people indicated on the traffic signs | | any other vehicles, such as buses and motorcycles, as indicated on signs prior to the start of the lane, irrespective of the number of occupants. |
|
| Laws RTRA sects 5 & 8, & RTA 1988, sect 36 |
| 143) | One-way streets. Traffic MUST travel in the direction indicated by signs. Buses and/or cycles may have a contraflow lane. Choose the correct lane for your exit as soon as you can. Do not change lanes suddenly. Unless road signs or markings indicate otherwise, you should use
|
|
