United Kingdom · Road laws
United Kingdom road traffic laws and penalties
Driving-side, speed, alcohol, phone and seat-belt rules across the UK, including notable national differences.
- Country
- United Kingdom
- Topic
- Road laws
- Last reviewed
- 24 August 2026
- Official source
- Open source ↗
Key rules
• Traffic keeps to the left and vehicles normally overtake on the right. Speed-limit signs and speedometers use miles per hour, not kilometres per hour.
• For cars and motorcycles, the national limit is normally 70 mph on motorways and dual carriageways and 60 mph on single carriageways, unless signs set another limit. In built-up areas the usual limit is 30 mph in England, Scotland and Northern Ireland, while restricted roads in Wales generally use 20 mph. Vehicle type and towing can reduce these limits.
• The Highway Code contains both legal requirements, marked MUST/MUST NOT, and advisory rules. Breaking an advisory rule can still be evidence in court.
Speed, phone and restraint penalties
The minimum speeding sanction is normally a £100 fine and 3 penalty points. If prosecuted in court, the maximum fine is generally £1,000, or £2,500 for motorway speeding, and disqualification is possible.
It is illegal to hold and use a phone, sat-nav, tablet or other interactive device while driving or riding, including while stationary in traffic or supervising a learner. The usual fixed penalty is £200 and 6 points. Court maximums are £1,000, or £2,500 for bus and goods-vehicle drivers. Hands-free use can still result in prosecution if the driver is not in proper control.
Drivers and passengers must wear seat belts where required. A seat-belt offence can reach £500. The driver is responsible for ensuring children under 14 use the correct restraint; children normally need an appropriate car seat until reaching 135 cm or age 12, whichever comes first.
Alcohol differs within the UK
The blood-alcohol limit is 80 mg per 100 ml in England, Wales and Northern Ireland, but 50 mg in Scotland. The equivalent breath limits are 35 and 22 micrograms per 100 ml. The safest plan is not to drink at all before driving. Driving or attempting to drive over the limit can bring up to six months in prison, an unlimited fine and a ban of at least one year, rising for repeat offences.
Rules visitors often miss
• Flashing headlights means only “I am here”; it does not officially give way or invite another road user to move.
• Do not sound the horn while stationary, except when another moving road user presents danger. On a restricted road, do not use it between 11:30 pm and 7:00 am except for danger.
• Rules and enforcement are not completely uniform across the four nations. Wales has the widespread 20 mph restricted-road limit, Scotland has the lower alcohol limit, and Northern Ireland has its own licensing and penalty administration. Follow local signs and the relevant national authority.
Source and scope
Reviewed on 24 August 2026 against the official Highway Code and GOV.UK pages for speeding, phone, seat-belt and drink-driving penalties. The figures shown are common fixed or court maximum amounts; police disposal, licence status, the nation and the court can alter the outcome. Check the linked official source before travel.
• Traffic keeps to the left and vehicles normally overtake on the right. Speed-limit signs and speedometers use miles per hour, not kilometres per hour.
• For cars and motorcycles, the national limit is normally 70 mph on motorways and dual carriageways and 60 mph on single carriageways, unless signs set another limit. In built-up areas the usual limit is 30 mph in England, Scotland and Northern Ireland, while restricted roads in Wales generally use 20 mph. Vehicle type and towing can reduce these limits.
• The Highway Code contains both legal requirements, marked MUST/MUST NOT, and advisory rules. Breaking an advisory rule can still be evidence in court.
Speed, phone and restraint penalties
The minimum speeding sanction is normally a £100 fine and 3 penalty points. If prosecuted in court, the maximum fine is generally £1,000, or £2,500 for motorway speeding, and disqualification is possible.
It is illegal to hold and use a phone, sat-nav, tablet or other interactive device while driving or riding, including while stationary in traffic or supervising a learner. The usual fixed penalty is £200 and 6 points. Court maximums are £1,000, or £2,500 for bus and goods-vehicle drivers. Hands-free use can still result in prosecution if the driver is not in proper control.
Drivers and passengers must wear seat belts where required. A seat-belt offence can reach £500. The driver is responsible for ensuring children under 14 use the correct restraint; children normally need an appropriate car seat until reaching 135 cm or age 12, whichever comes first.
Alcohol differs within the UK
The blood-alcohol limit is 80 mg per 100 ml in England, Wales and Northern Ireland, but 50 mg in Scotland. The equivalent breath limits are 35 and 22 micrograms per 100 ml. The safest plan is not to drink at all before driving. Driving or attempting to drive over the limit can bring up to six months in prison, an unlimited fine and a ban of at least one year, rising for repeat offences.
Rules visitors often miss
• Flashing headlights means only “I am here”; it does not officially give way or invite another road user to move.
• Do not sound the horn while stationary, except when another moving road user presents danger. On a restricted road, do not use it between 11:30 pm and 7:00 am except for danger.
• Rules and enforcement are not completely uniform across the four nations. Wales has the widespread 20 mph restricted-road limit, Scotland has the lower alcohol limit, and Northern Ireland has its own licensing and penalty administration. Follow local signs and the relevant national authority.
Source and scope
Reviewed on 24 August 2026 against the official Highway Code and GOV.UK pages for speeding, phone, seat-belt and drink-driving penalties. The figures shown are common fixed or court maximum amounts; police disposal, licence status, the nation and the court can alter the outcome. Check the linked official source before travel.