UK driver-vs-cyclist collision claims: H1-H3 hierarchy, the 1.5m passing rule and dooring

Rules 163 and 213: the 1.5 metre passing rule

The 29 January 2022 update rewrote two of the most important rules on overtaking cyclists. Rule 163 - directed at drivers - requires you to leave at least 1.5 metres when overtaking a cyclist at speeds up to 30 mph, and to leave more space at higher speeds. Rule 213 - directed at all road users - mirrors the rule from the cyclist-protection angle and again sets a 1.5 metre minimum at 30 mph or below, with more space at higher speeds. The 1.5 metre figure was published in the Highway Code itself for the first time in the 2022 update, having previously been a guideline only used in police enforcement.

The 1.5 metre rule is not itself a separate criminal offence. A sub-1.5 metre passing distance is normally prosecuted as careless driving under section 3 of the Road Traffic Act 1988 - and in the most serious cases, where the manoeuvre falls far below the standard expected of a competent and careful driver, as dangerous driving under section 2. Police forces across the UK have operated close-pass operations since 2016 - initially West Midlands Police, now rolled out nationally - in which plain-clothes officers cycle on busy routes and pull over drivers who pass below 1.5 metres. The standard sanction is a fixed-penalty notice and three penalty points, with prosecution reserved for repeat or aggravated cases.

In civil terms a sub-1.5 metre overtake that results in a mirror-clip, a swerve into the kerb or a panic-brake fall by the cyclist places primary fault on the driver under rules H1, 163 and 213 together. Where dashcam footage exists, an expert can fish-eye-correct the lens distortion and recover an accurate lateral clearance figure to within 10 centimetres. The point matters because insurers routinely argue passing distance was 'more than a metre' on driver-side accounts and an objective measurement closes the debate.

Dooring: regulation 105 of the Construction and Use Regulations 1986

Dooring - opening a vehicle door into the path of a passing cyclist - is one of the most frequent driver-side fault patterns on the UK cyclist-collision casualty statistics. Regulation 105 of the Road Vehicles (Construction and Use) Regulations 1986 provides that no person shall open, or cause or permit to be opened, any door of a vehicle on a road so as to injure or endanger any person. The offence carries a Fixed Penalty Notice. Where a cyclist is seriously injured, the door-opener can additionally be charged with causing serious injury by careless driving under section 2C of the Road Traffic Act 1988, and where the cyclist dies, with causing death by careless driving under section 2B.

Highway Code rule 239 - updated on 29 January 2022 - recommends the 'Dutch reach' technique. The driver or passenger uses the hand farthest from the door (left hand for the driver in a right-hand-drive UK car, right hand for the front passenger), forcing the body to rotate and the eyes to scan back along the carriageway for a passing cyclist before the door is opened. Rule 239 catches passengers as well as drivers; the regulation 105 offence catches whoever opens the door.

In civil terms a dooring claim is normally settled at 100% on the door-opener. The cyclist's primary task on intake is to establish the parked vehicle's position relative to the cycle lane (mandatory or advisory), the door's swing arc, the identity of the door-opener and the position of the bicycle at point of impact - all before the parked vehicle is moved. Modern insurer telematics increasingly record door-open events and door-open duration; a subject-access request to the third-party insurer can recover the telematics data on the door-opener's vehicle.

Common UK driver-cyclist collision patterns

Left-hook. A driver turning left across the path of a cyclist continuing straight ahead on the nearside catches the cyclist with the front nearside or middle of the vehicle. Rule H3 forbids cutting across a cyclist going ahead; rule 184 covers the general approach to a side-road turn. Liability normally rests 100% on the turning driver. Frequency is highest at urban side-road turns where mandatory cycle lanes are marked.

Right-hook. The mirror equivalent. A driver turning right across an oncoming cyclist's path. The same H3 priority engages and the same liability default applies. Frequency rises sharply at signal-controlled junctions with filter arrows, because cyclists at advance stop lines under rule 178 sit ahead of the motor traffic and the right-turning driver's sightline is compressed.

SMIDSY at a junction. A driver pulling out of a side road into the path of an oncoming cyclist reports they did not see them. Combination of A-pillar blind spot, saccadic eye-movement masking and inattentional blindness. Rule 170 sits squarely on the emerging driver; rule H1 reinforces. SMIDSY is not a defence - it is the perceptual explanation for why rule 170 is so heavily weighted against the emerging driver.

Door-strike. A driver or passenger opens a door into the path of a cyclist passing a parked vehicle. Regulation 105 Construction and Use 1986, Highway Code rule 239. Liability normally rests 100% on the door-opener. The cyclist's injury profile is unusually severe because the door arrests forward momentum without crumple, and head-strike on the door edge or A-pillar is common.

Mirror-clip on overtake. A sub-1.5 metre overtake where the vehicle's offside mirror clips the cyclist's handlebar, shoulder or elbow. Rules 163 and 213. Liability normally rests on the driver; cyclist falls and consequential head injury, fracture and road-rash follow even at modest speeds. The mirror itself often shears off or folds - the damage pattern is forensically distinctive and supports the cyclist's account against driver denial.

Roundabout-entry over an established cyclist. A driver entering a roundabout fails to give way to a cyclist already on the roundabout. Highway Code rule 187 and rule 188 (mini-roundabouts). Cyclists on roundabouts have priority on the give-way-to-the-right principle and rule H1 reinforces. Liability normally rests on the entering driver.

Helmet non-use, lights and contributory negligence

Cyclist helmet use is not legally required in the UK. Highway Code rule 59 recommends a helmet that conforms to current regulations and is fitted securely but imposes no obligation. The leading English authority on helmet non-use is Smith v Finch [2009] EWHC 53 (QB), in which Mr Justice Griffith Williams held that a cyclist who does not wear a helmet may be guilty of contributory negligence - but only where the defendant proves on the evidence that wearing a helmet would have prevented or materially reduced the specific injury sustained. The court rejected a default reduction. In Smith v Finch itself the defendant failed on the medical evidence to prove the injury would have been reduced and no deduction followed.

The point matters because insurers routinely assert a contributory deduction for non-helmet use in correspondence as if it were a default. Properly applied, Smith v Finch requires a biomechanical expert's report on injury mechanism - the acceleration / deceleration profile, the impact point on the skull, the energy attenuation a CE-marked helmet would have provided - before any deduction can follow. Most cyclist-helmet contributory arguments fail without that expert evidence. The contrasting decision in Reynolds v Strutt & Parker LLP [2011] EWHC 2263 (QB) - a cycling-race-in-the-course-of-employment fact pattern - turned on the specific evidence the helmet would have prevented the impact-mechanism head injury.

Cycle lights and reflectors are a different question. Riding without lights between sunset and sunrise breaches the Road Vehicles Lighting Regulations 1989. Where a cyclist is struck at night without lights, a contributory finding in the range of 20% to 50% is common - anchored to whether the absent lights causally contributed to the driver's failure to see the cyclist. Reflective clothing is recommended under rule 59 but is not mandatory; a finding of contributory negligence purely on clothing colour is rare. Phethean-Hubble v Coles [2012] EWCA Civ 349 is a Court of Appeal comparator on apportionment in a young-cyclist-vs-driver collision.

The cyclist's claim route: tort principles, Limitation Act 1980 and the CLA 2018 exclusion

A cyclist injured by a motor vehicle is a tort claimant. Damages are recovered on the standard common-law basis - general damages for pain, suffering and loss of amenity, special damages for loss of earnings, treatment costs, replacement bicycle and equipment, care and assistance. The Judicial College Guidelines set the baseline for general damages; reported authorities and the Quantum service on Westlaw / Lawtel set the comparators.

Critically, the fixed-tariff scheme under the Civil Liability Act 2018 and the Whiplash Injury Regulations 2021 (as amended for accidents on or after 31 May 2025 by SI 2025/615) does not apply to cyclist injuries. The tariff is limited to whiplash injuries sustained by an occupant of a motor vehicle. A cyclist's broken collarbone, fractured wrist, road-rash, fractured radial head, concussion or post-traumatic-stress claim falls outside the tariff and is valued at common-law levels. General damages for a serious cyclist head injury can run into six figures where there is long-term cognitive impact; the tariff would limit a whiplash claim on the same severity to a small fixed sum.

The route depends on injury value. Where general damages sit below £5,000 the cyclist's claim runs through the Official Injury Claim portal under the Civil Liability Act 2018 small-claims regime - the cyclist is treated as a 'vulnerable road user' and benefits from a higher level of portal support. Where general damages exceed £5,000 the claim proceeds outside the portal through a SRA-regulated solicitor as a full personal injury claim - typically funded on a no win, no fee CFA. Our standalone accident claim time limit page covers the section 11 three-year clock and the section 28 tolling for minors and protected parties in detail; the same clock binds the cyclist whether the file routes through the OIC portal or a solicitor. Where the driver was uninsured or fled the scene, claims run instead against the MIB - see our pages on a MIB uninsured driver claim or a MIB untraced driver claim.

Illustrative UK driver-cyclist case patterns (composite, not real persons)

Manchester left-hook on Oxford Road. A driver turning left from the A34 Oxford Road into a side road catches a cyclist continuing straight ahead in the nearside mandatory cycle lane. The cyclist has front and rear lights, a helmet-cam and was riding within the cycle infrastructure. Rule H3 engages. Liability is accepted at 100% on the driver within three weeks of notification; the cyclist's injury claim - fractured collarbone, ligament damage - proceeds outside the OIC portal because general damages sit above £5,000.

Bristol dooring on Whiteladies Road. A taxi passenger opens the offside rear door into the path of a passing cyclist riding in the mandatory cycle lane. Regulation 105 Construction and Use 1986 engages. The taxi driver's company accepts vicarious liability for the passenger's act under section 151 RTA 1988. Liability is settled 100% within a fortnight; the cyclist's head injury claim proceeds through a SRA-regulated solicitor on the basis of the helmet-cam evidence and an early biomechanical report.

Edinburgh close pass on the A8. A van overtakes a cyclist at approximately 0.9 metres lateral clearance at 40 mph on the A8 westbound. The cyclist swerves to the kerb, falls and sustains a fractured wrist. The cyclist's Garmin Varia rear-radar dashcam recovers the passing distance to within 10 centimetres on expert fish-eye correction. Police Scotland charge careless driving under section 3 RTA 1988; the cyclist's civil claim is settled at 100% on the driver under rules 163 and 213.

Cardiff right-hook at a signal-controlled junction. A driver turning right across an oncoming cyclist's path at a Cathays junction collides with the cyclist as the cyclist enters from an advance stop line. Rule H3 engages and rule 178 (advance stop lines) is in play. Liability is accepted at 100% on the turning driver. The cyclist's claim proceeds through the partner solicitor network because the cyclist sustained a closed head injury and long-term cognitive symptoms are reported at six-month review.

Related UK collision and claim pages

Each linked page deepens one part of the driver-vs-cyclist claim picture. The collision types hub gives the wider 24-scenario landscape. The motorbike, HGV and horse rider pages cover the other vulnerable-road-user vertical. The junction accident page deepens the left-hook / right-hook analysis. The pothole damage page covers a parallel category where cyclists are especially vulnerable. The non-fault and car accident hub pages give the underlying claims-management frame.

• UK collision types hub
• Car accident claims
• Non-fault car accident claims
• Motorbike collision claims
• HGV collision claims
• Horse rider collision claims
• Junction accident claims
• Pothole damage claims

Six-step UK driver-cyclist post-collision sequence

1. Step 1

   Stop, make the scene safe and comply with section 170 of the Road Traffic Act 1988

   Stop, switch on hazard lights and move to a place of safety on the verge or footway where possible. Section 170 of the Road Traffic Act 1988 requires you to stop and to exchange names, addresses, vehicle registrations and insurer details with every other party and with any injured person's representative. Where injury is present - and on a driver-vs-cyclist collision the cyclist is almost always injured - the collision must be reported to the police as soon as reasonably practicable and in any case within 24 hours, and again where details cannot be exchanged at the scene. Treat the cyclist as a vulnerable road user under rule H1: prioritise their welfare, do not move the bicycle and call 999 for ambulance support if there is any sign of head injury, loss of consciousness or chest pain.

2. Step 2

   Photograph the lateral clearance, the road furniture and the final rest positions

   Before any vehicle is moved, photograph the lateral clearance between the vehicle and the bicycle, the cycle lane (mandatory or advisory), the parked-vehicle position if dooring is in issue, the cycle's final rest position, the cycle lights and reflectors and the cyclist's helmet if worn. Take a second set from the driver's seated position on the approach - this is the only contemporaneous record of what the driver could realistically see. Note the date and time. Photograph all damage panels on all parties (mirror, paintwork, panel scuff on the vehicle; frame, fork, wheel, handlebar on the bicycle). On a left-hook or right-hook file the approach-angle photograph is dispositive.

3. Step 3

   Extract and back up dashcam and cyclist-cam footage within 24 hours

   Dashcam, rear-radar dashcam and cyclist-side helmet-cam or handlebar-cam footage is the single highest-weight evidence on a cyclist-collision file. Extract the relevant clip - covering at least 30 seconds before and 30 seconds after impact - to a separate device or cloud backup within 24 hours, before the device's loop-record overwrites it. Save the original file unedited and keep a checksum or hash where the platform supports it. Where the cyclist consents to share their helmet-cam footage, reconcile it with the driver's dashcam frame-by-frame: passing distance, signal, road position and impact angle all crystallise out of the dual-camera record. Note file names, start timestamps and a one-line description of what is visible.

4. Step 4

   Request junction CCTV, ride-trace data and any third-party witness video

   UK local authority and National Highways CCTV is typically retained for 14 to 30 days before being overwritten. Send a written request to the relevant local highway authority's traffic management or insurance team identifying the location, date, time, direction of travel and camera reference where known. Where the cyclist used a GPS computer - Garmin Connect, Wahoo, Hammerhead, Strava - request the ride trace, which records speed, position and elevation second-by-second. Where shop-front, residential or fleet-vehicle CCTV may have captured the event, canvas the immediate area inside the first week. Bus and delivery-van forward-facing cameras frequently catch a cyclist-collision approach.

5. Step 5

   Identify the controlling Highway Code rule and the H1/H3 position

   Match the impact pattern to the correct Highway Code rule. Left-hook or right-hook engages rule H3 and rule 184. Sub-1.5 metre overtake engages rules 163 and 213. Dooring engages rule 239 and regulation 105 of the Construction and Use Regulations 1986. Junction-emergence SMIDSY engages rule 170 and rule H1. Roundabout-entry over an established cyclist engages rule 187. Primary-position challenge engages rule 72. Two-abreast challenge engages rule 66. Naming the rule on the claim notification letter focuses the third-party insurer on the right apportionment template and shortens liability negotiation. Insurers settle materially faster against a specific rule number than against a generic 'fault' allegation.

6. Step 6

   Instruct an independent engineer and prepare the cyclist's medical and earnings build (with separate written consent for any PI referral)

   Where vehicle damage is structural or the safety of the vehicle is unclear, instruct an independent engineer rather than relying on the at-fault insurer's appointed engineer. For the cyclist's injury, obtain a GP record, A&E discharge summary and an early independent medical examination. Where general damages sit below £5,000 the cyclist's claim route is the Official Injury Claim portal under the Civil Liability Act 2018; where the injury is more serious (head injury, fracture, long-term cognitive impact) the case proceeds through a SRA-regulated solicitor on the pre-action protocol route. Personal-injury referral is a regulated activity - CityGrip obtains the cyclist's separate written consent before any introduction to a partner solicitor firm. CityGrip Accident Claims (Citygrip LTD) operates as a UK accident claim management business and works on a no-upfront-cost basis recovered from the at-fault insurer.