10 Facts About Traffic Collisions on Chiswick High Road

Few subjects are as prone to myths, misconceptions and ill-informed opinion as people travelling by bike.  Fortunately, when it comes to casualties involving cyclists, pedestrians and other road users there is comprehensive information available to provide insight into the real dangers on our streets.

For every traffic casualty requiring medical attention police complete a report called a STATS19 form.  Hounslow Cycling Campaign has analysed STATS19 data for over 450 casualties occuring on Chiswick High Road and King Street between 2005 and 2017.  We have used the source reports, not the summary information provided by some websites. This is actual data about the collisions, not just a guess or belief about what happened.

We then asked experts to review our analysis of the impact of Cycleway 9 upon cyclist casualties, demonstrating that it could have prevented 75% of cyclist casualties.  We are grateful for their comments and feedback. Dr Paul Schepers of the Dutch Ministry of Infrastructure and the Environment is one of the world’s leading experts on risk associated with cycle route design.  Professor John Parkin of the University of the West of England is the author of “Designing for Cycle Traffic” and many other books and papers on transport and Dr Rachel Aldred of the University of Westminster is a leading researcher into cycling.  These academic experts confirmed our conclusions. 

Ten Facts

1. Motor vehicles were involved with 98% of casualties on Chiswick High Road and King Street.

Chiswick High Road and King Street Cyclist Casualties (2005-2017)

2. There are over 70% more cyclist casualties than pedestrian casualties on Chiswick High Road and King Street.

A315 Casualty Type and Mode of Transport

3. A cyclist is injured in a collision with a motor vehicle on Chiswick High Road or King Street every 5 weeks, on average.

A315 Casualties by year

4. Cycleway 9 could have prevented 75% of cyclist casualties. 60% of these casualties would not occur with CW9 (such as cyclists being hit by car doors), and a further 15% have reduced risk with a separated, protected cycle track, as compared to cyclists mixed in with general traffic. (see note)

5. The majority of cyclists and pedestrians injured on Chiswick High Road are from the local area.  The majority of drivers of motor vehicles colliding with cyclists and pedestrians are NOT from the local area. (see note)

6. The three most dangerous sections of road are:

  1. Chiswick High Road – King Street – Goldhawk Road junction (41 collisions)
  2. Chiswick High Road between Dukes Avenue and Dukes Road (36 collisions)
  3. King Street between Cromwell Avenue and Studland Street (31 collisions)
Casualties on A315

7. Police assign reasons for crashes based upon their assessment of what caused the collision.  The top cause for collisions with a cyclist was that the driver “Failed to look properly”, occurring in 79% of collisions. (see note)

8. During the entire period there was one pedestrian casualty caused by a person driving a car on the pavement.  There were no pedestrian casualties caused by a person cycling on the pavement.

9. No cyclist casualties were caused by people on bikes going through red lights, though 2 pedestrians were injured in this way. 

10. There were 6 pedestrian casualties caused by collisions between cyclists and pedestrians in the 13 year period; 4 occurred when the pedestrian stepped onto the road and the cyclist collided with them; the cyclist was also injured in 2 of these collisions. 

Note 1

Analysis of collision cause.

Note 2
  • 62% of cyclist casualties on Chiswick High Road were from W4 and adjacent postcodes.
  • 66% of motor vehicle drivers involved in collisions with cyclists were from outside this area.
  • 57% of pedestrian casualties on Chiswick High Road were from W4 and adjacent postcodes.
  • 69% of motor vehicle drivers involved in collisions with pedestrians were from outside this area.
Note 3

Referred to as “contributory cause”