People killed or seriously injured in road traffic accidents

This measures people killed or seriously injured (KSI) in road traffic accidents per billion vehicle miles.
We aim to be in the top quartile of statistical neighbours by March 2022


2018 benchmarking performance

Killed and seriously injured casualties per billion vehicle miles 2018
Percentage changed in killed and seriously injured casualties in 2018 comparee to 2010-2014
Killed and seriously injured and casualties per million population 2018

March 2020 performance

24 people were killed on West Sussex Highways during 2019 compared to 20 in 2018; despite the increase, this still remains one of the lowest outturns on record and is substantially lower than the 2005-2009 base line average of 43 people killed.
 The number of KSIs for 2019 currently stands at 573, but this is likely to change as data still being reconciled by the police is transferred to WSCC. This is a large increase on previous years and is linked to Sussex Police’s switch to a national collision-recording database on 28 May 2019. Similar to many other authorities who have transferred to the system, West Sussex has experienced a large increase in the number of Serious Casualties who would formally have been recorded as Slight Casualties. The new database known as CRASH selects the casualty severity from recorded injuries, which is more accurate than the previous manual entries.
 While the total number of collisions and casualties remain similar to previous years, the switch to the new database means the KSI data cannot be compared to previous annual data and has considerably widened the gap towards our Reduction Target which is derived from KSI data from the former collision recording database.
 The Department for Transport is supplying adjusted historical data to authorities to enable comparison and WSCC are considering whether to apply this to their March 2023 Reduction Target. The adjusted KSI figures suggest the 2019 outturn reflects the flat-line we have experienced in recent years. The total number of recorded collisions and resulting casualties of all severities, which are not affected by the new system, confirms this.
The adjusted KSI figures suggest the 2019 outturn reflects the flat-line we have experienced in recent years.


The Road Safety Framework is being reviewed and updated during 2020 with a stronger emphasis on the introduction of a "Safe Systems" approach to managing the network and identifying road safety interventions.
In October 2019 two members of staff completed the RoSPA Road Safety Engineering course; this is 10 days formal Collision Investigation/Road Safety Engineering training, recognised as the industry standard for road safety engineers.
Our new WSCC Road Safety Facebook page expands our digital presence and allows us to engage with the community on road safety issues, run educational campaigns and generate discussion and dialogue between road users.
 In 2018/19 a number of road safety schemes were developed including the introduction of a £2.4m road safety scheme on the A285 between Halnaker and Petworth. The works consist of building a hard strip between the road and the verge and a ribbed edge line, similar to the ones found on motorways and dual carriageways. More than half of the serious accidents on the A285 involve drivers leaving the road; the ribbed edge line will introduce an audible and tactile warning to drivers if they leave their lane.
Major road safety schemes comprising of road surfacing improvement were completed on the A280 Cricket Club and Waterworks bends and a junction improvement introduced on the A24 and Warnham.
Continued investment with £600k for road safety investigation and improvement schemes in 2019 comprising of a number of larger schemes including resurfacing and profiling bends on the B2133 Hughes Hill, Wisborough Green, reconfiguration of mini-roundabout junction on Portsmouth Road Lindfield, the design of a junction improvement at New Road on the A285 Boxgrove and treatments at 15 identified “black Spots” across the county. However it should be recognised that the benefits from road safety engineering schemes take time to translate into reductions in the casualty figures.
We are continuing to be an active partner within the Sussex Safer Roads Partnership promoting a wide range of behavioural change programmes and we are on target to train 10,000 year 6 pupils in BikeAbility Cycle Proficiency.