The Highway Code Rule(s): 127-146, 152-156

Rule 127

A broken white line. This marks the centre of the road. When this line lengthens and the gaps shorten, it means that there is a hazard ahead. Do not cross it unless you can see the road is clear and wish to overtake or turn off.

Rule 128

Double white lines where the line nearest to you is broken. This means you may cross the lines to overtake if it is safe, provided you can complete the manoeuvre before reaching a solid white line on your side. White direction arrows on the road indicate that you need to get back onto your side of the road.

Rule 129

Double white lines where the line nearest you is solid. This means you MUST NOT cross or straddle it unless it is safe and you need to enter adjoining premises or a side road. You may cross the line if necessary, provided the road is clear, to pass a stationary vehicle, or overtake a pedal cycle, horse or road maintenance vehicle, if they are travelling at 10 mph (16 km/h) or less.

Rule 130

Areas of white diagonal stripes or chevrons painted on the road. These are to separate traffic lanes or to protect traffic turning right.

  • If the area is bordered by a broken white line, you should not enter the area unless it is necessary and you can see that it is safe to do so.
  • If the area is marked with chevrons and bordered by solid white lines you MUST NOT enter it except in an emergency.

Rule 131

Lane dividers. These are short, broken white lines which are used on wide carriageways to divide them into lanes. You should keep between them.

Rule 132

Reflective road studs may be used with white lines.

  • White studs mark the lanes or the middle of the road.
  • Red studs mark the left edge of the road.
  • Amber studs mark the central reservation of a dual carriageway or motorway.
  • Green studs mark the edge of the main carriageway at lay-bys and slip roads.
  • Green/yellow studs indicate temporary adjustments to lane layouts, e.g. where road works are taking place.

Rule 132: Reflective road studs mark the lanes and edge of the carriageway

Rule 132: Reflective road studs mark the lanes and edge of the carriageway

Lane discipline

Rule 133

If you need to change lane, first use your mirrors and if necessary take a quick sideways glance to make sure you will not force another road user to change course or speed. When it is safe to do so, signal to indicate your intentions to other road users and when clear, move over.

Rule 134

You should follow the signs and road markings and get into the lane as directed. In congested road conditions do not change lanes unnecessarily. Merging in turn is recommended but only if safe and appropriate when vehicles are travelling at a very low speed, e.g. when approaching road works or a road traffic incident. It is not recommended at high speed.

Single carriageway

Rule 135

Where a single carriageway has three lanes and the road markings or signs do not give priority to traffic in either direction

  • use the middle lane only for overtaking or turning right. Remember, you have no more right to use the middle lane than a driver coming from the opposite direction
  • do not use the right-hand lane.

Rule 136

Where a single carriageway has four or more lanes, use only the lanes that signs or markings indicate.

Dual carriageways

A dual carriageway is a road which has a central reservation to separate the carriageways.

Rule 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.

Rule 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.

Rule 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.

Rule 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.

Rule 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.

Rule 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 ‘Traffic 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.

Rule 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

  • the left-hand lane when going left
  • the right-hand lane when going right
  • the most appropriate lane when going straight ahead. Remember – traffic could be passing on both sides.

Rule 144

You MUST NOT

  • drive dangerously
  • drive without due care and attention
  • drive without reasonable consideration for other road users.

Rule 145

You MUST NOT drive on or over a pavement, footpath or bridleway except to gain lawful access to property, or in the case of an emergency.

Rule 146

Adapt your driving to the appropriate type and condition of road you are on. In particular

  • do not treat speed limits as a target. It is often not appropriate or safe to drive at the maximum speed limit
  • take the road and traffic conditions into account. Be prepared for unexpected or difficult situations, for example, the road being blocked beyond a blind bend. Be prepared to adjust your speed as a precaution
  • where there are junctions, be prepared for road users emerging
  • in side roads and country lanes look out for unmarked junctions where nobody has priority
  • be prepared to stop at traffic control systems, road works, pedestrian crossings or traffic lights as necessary
  • try to anticipate what pedestrians and cyclists might do. If pedestrians, particularly children, are looking the other way, they may step out into the road without seeing you.

Rule 152

Residential streets. You should drive slowly and carefully on streets where there are likely to be pedestrians, cyclists and parked cars. In some areas a 20 mph (32 km/h) maximum speed limit may be in force. Look out for

  • vehicles emerging from junctions or driveways
  • vehicles moving off
  • car doors opening
  • pedestrians
  • children running out from between parked cars
  • cyclists and motorcyclists.

Rule 153

Traffic-calming measures. On some roads there are features such as road humps, chicanes and narrowings which are intended to slow you down. When you approach these features reduce your speed. Allow cyclists and motorcyclists room to pass through them. Maintain a reduced speed along the whole of the stretch of road within the calming measures. Give way to oncoming road users if directed to do so by signs. You should not overtake other moving road users while in these areas.

Rule 153: Chicanes may be used to slow traffic down

Rule 153: Chicanes may be used to slow traffic down

Country roads

Rule 154

Take extra care on country roads and reduce your speed at approaches to bends, which can be sharper than they appear, and at junctions and turnings, which may be partially hidden. Be prepared for pedestrians, horse riders, cyclists, slow-moving farm vehicles or mud on the road surface. Make sure you can stop within the distance you can see to be clear. You should also reduce your speed where country roads enter villages.

Rule 155

Single-track roads. These are only wide enough for one vehicle. They may have special passing places. If you see a vehicle coming towards you, or the driver behind wants to overtake, pull into a passing place on your left, or wait opposite a passing place on your right. Give way to road users coming uphill whenever you can. If necessary, reverse until you reach a passing place to let the other vehicle pass. Slow down when passing pedestrians, cyclists and horse riders.

Rule 156

Do not park in passing places.

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