Road collisions in Portsmouth
Police recorded 2,246 road collisions involving injury in Portsmouth between 2021 and 2025, about 449 a year. 19 of them were fatal, and an estimated 452 involved serious injury once DfT's severity adjustment is applied. These are reported injury collisions only: damage-only incidents and unreported injuries are not included.
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When collisions happen
The busiest hour was 4pm to 5pm, and 33% of collisions happened between 3pm and 7pm (more than the 32% across Great Britain). Friday had the most collisions, and 24% happened at weekends.
Trend over time
Reported collisions went from 428 in 2021 to 457 in 2025, a rise of 7%. Counts are affected by traffic levels, population and changes in how police record injuries, so Portsmouth should not be ranked against other areas on these numbers alone.
Who is affected
Across Portsmouth, 2,578 people were injured or killed in these collisions. Pedestrians were 17% of casualties (14% across Great Britain), pedal cyclists 22% (12%) and motorcyclists 14% (12%). Car and taxi occupants made up 38%. 10 of the pedestrians were killed.
Children aged 0 to 15 were 11% of casualties, higher than the 9% national share. People aged 16 to 25 were 24% (21% nationally), and people over 65 were 8% (10% nationally).
| Road user | Casualties | Share in Portsmouth | Share across GB |
|---|---|---|---|
| Pedestrians | 431 | 16.7% | 14.5% |
| Pedal cyclists | 578 | 22.4% | 11.9% |
| Motorcyclists | 364 | 14.1% | 12.4% |
| Car and taxi occupants | 973 | 37.7% | 54.4% |
| Bus and minibus occupants | 16 | 0.6% | 1.8% |
| Van and goods vehicle occupants | 49 | 1.9% | 3.5% |
| Other road users | 167 | 6.5% | 1.6% |
Casualties by age
| Age | Casualties | Share in Portsmouth | Share across GB |
|---|---|---|---|
| 0 to 5 | 41 | 1.6% | 1.6% |
| 6 to 10 | 68 | 2.6% | 2.6% |
| 11 to 15 | 173 | 6.7% | 4.8% |
| 16 to 20 | 309 | 12.0% | 10.6% |
| 21 to 25 | 320 | 12.4% | 11.0% |
| 26 to 35 | 530 | 20.6% | 20.8% |
| 36 to 45 | 403 | 15.6% | 15.8% |
| 46 to 55 | 296 | 11.5% | 12.8% |
| 56 to 65 | 238 | 9.2% | 10.1% |
| 66 to 75 | 114 | 4.4% | 5.3% |
| Over 75 | 85 | 3.3% | 4.5% |
Vehicles involved
18.6% of collisions involved a pedestrian casualty (17.7% nationally), 25.5% a cyclist (15.0%) and 15.4% a motorcyclist (15.3%). 1.7% involved a goods vehicle (3.9% nationally) and 21.6% involved a driver aged 17 to 24 (21.1%). 168 collisions involved an e-scooter.
| Vehicle | Vehicles | Share in Portsmouth | Share across GB |
|---|---|---|---|
| Cars and taxis | 2,520 | 62.2% | 69.7% |
| Vans (up to 3.5 tonnes) | 264 | 6.5% | 6.4% |
| Heavy goods vehicles | 41 | 1.0% | 2.3% |
| Motorcycles | 376 | 9.3% | 9.3% |
| Pedal cycles | 605 | 14.9% | 8.7% |
| Buses and minibuses | 53 | 1.3% | 1.8% |
| Other vehicles | 191 | 4.7% | 1.8% |
Collision hotspots in Portsmouth
These are the 100 metre squares with the most reported collisions in 2021 to 2025. Location is the average position of the collisions in each square, so treat it as approximate.
| # | Main road | Junction type | Collisions | Fatal | Map |
|---|---|---|---|---|---|
| 1 | A3 | T or staggered junction | 21 | 0 | View on map |
| 2 | A3 | Not at a junction | 21 | 0 | View on map |
| 3 | A2030 | T or staggered junction | 14 | 0 | View on map |
| 4 | A2030 | Not at a junction | 14 | 0 | View on map |
| 5 | B2151 | T or staggered junction | 13 | 0 | View on map |
| 6 | A2047 | T or staggered junction | 13 | 0 | View on map |
| 7 | A2047 | T or staggered junction | 13 | 0 | View on map |
| 8 | A2047 | T or staggered junction | 13 | 0 | View on map |
| 9 | A3 | Crossroads | 13 | 0 | View on map |
| 10 | A397 | Not at a junction | 13 | 0 | View on map |
| 11 | A2030 | Not at a junction | 12 | 0 | View on map |
| 12 | A3 | Not at a junction | 12 | 0 | View on map |
| 13 | B2154 | T or staggered junction | 11 | 0 | View on map |
| 14 | A288 | Not at a junction | 11 | 0 | View on map |
| 15 | A2030 | Crossroads | 11 | 0 | View on map |
| 16 | A3 | Not at a junction | 11 | 0 | View on map |
| 17 | A27 | Not at a junction | 11 | 0 | View on map |
| 18 | B2154 | Crossroads | 11 | 0 | View on map |
| 19 | A2030 | Not at a junction | 11 | 0 | View on map |
| 20 | A3 | T or staggered junction | 10 | 0 | View on map |
| 21 | A2047 | T or staggered junction | 10 | 0 | View on map |
| 22 | Unnumbered road | T or staggered junction | 10 | 0 | View on map |
| 23 | A288 | T or staggered junction | 10 | 0 | View on map |
| 24 | A2030 | Not at a junction | 10 | 0 | View on map |
| 25 | A27 | Not at a junction | 10 | 0 | View on map |
Numbered roads with the most collisions
84% of collisions happened on roads with a 30 mph limit or lower (69% nationally), and 6% on roads with a 60 or 70 mph limit (18% nationally). 56% were at or within 20 metres of a junction or roundabout, close to the national 54%.
| Road | Collisions | Fatal | Serious (est.) |
|---|---|---|---|
| A2030 | 219 | 4 | 39 |
| A3 | 214 | 0 | 40 |
| A2047 | 210 | 2 | 37 |
| A288 | 163 | 0 | 37 |
| A27 | 132 | 2 | 26 |
| B2154 | 73 | 1 | 17 |
| M27 | 50 | 1 | 8 |
| B2177 | 48 | 1 | 14 |
| B2151 | 38 | 0 | 6 |
| A397 | 34 | 0 | 5 |
| M275 | 33 | 0 | 2 |
| B2152 | 10 | 0 | 0 |
| B2155 | 8 | 0 | 1 |
| A228 | 5 | 0 | 1 |
| A3020 | 2 | 0 | 0 |
Collisions on unnumbered local streets are not listed here. Use the postcode search to see them.
Conditions
31% of collisions in Portsmouth happened in darkness, higher than the 28% across Great Britain. 87% happened on roads classed as urban, higher than the national 67%.
Type of road
| Type of road | Collisions | Share in Portsmouth | Share across GB |
|---|---|---|---|
| Motorway | 83 | 3.7% | 3.0% |
| A(M) road | 0 | 0.0% | 0.2% |
| A road | 986 | 43.9% | 44.0% |
| B road | 181 | 8.1% | 12.5% |
| C road | 1 | 0.0% | 4.4% |
| Unclassified road | 995 | 44.3% | 35.9% |
Speed limit
| Speed limit | Collisions | Share in Portsmouth | Share across GB |
|---|---|---|---|
| 20 mph | 329 | 14.6% | 17.1% |
| 30 mph | 1,548 | 68.9% | 52.0% |
| 40 mph | 163 | 7.3% | 8.7% |
| 50 mph | 75 | 3.3% | 4.4% |
| 60 mph | 23 | 1.0% | 12.2% |
| 70 mph | 108 | 4.8% | 5.5% |
Junctions
| Junctions | Collisions | Share in Portsmouth | Share across GB |
|---|---|---|---|
| Not at a junction | 989 | 44.1% | 45.9% |
| T or staggered junction | 852 | 38.0% | 28.5% |
| Crossroads | 206 | 9.2% | 9.5% |
| Junction with more than four arms | 11 | 0.5% | 1.6% |
| Private drive or entrance | 68 | 3.0% | 2.2% |
| Other junction | 20 | 0.9% | 6.1% |
| Roundabout | 97 | 4.3% | 6.2% |
Light conditions
| Light conditions | Collisions | Share in Portsmouth | Share across GB |
|---|---|---|---|
| Daylight | 1,552 | 69.1% | 71.7% |
| Darkness, street lights lit | 599 | 26.7% | 20.6% |
| Darkness, street lights unlit | 9 | 0.4% | 0.7% |
| Darkness, no street lighting | 30 | 1.3% | 5.3% |
| Darkness, lighting unknown | 56 | 2.5% | 1.7% |
Urban or rural
| Urban or rural | Collisions | Share in Portsmouth | Share across GB |
|---|---|---|---|
| Urban | 1,957 | 87.1% | 67.2% |
| Rural | 289 | 12.9% | 32.8% |
About these figures
Only collisions involving injury that were reported to the police are counted. The figures are not adjusted for traffic volume or population, so they should not be used to rank areas against each other. Serious and slight splits use the Department for Transport's severity adjustment. Full explanation.