S30122 Junction Safety WP3

Previous research has identified that collisions at junctions represent at least 21%

of Killed and Seriously Injured KSI collisions on the Strategic Road Network

SRN, and this is likely to be an underestimate1. The previous research did not

provide strong recommendations for junction treatments that would reduce KSIs

at these locations. Not having strong recommendations for junction treatments

limits our ability to have a strong impact on National Highways Key Performance

Indicator 1 KPI1, Safety.

This research seeks, the effectiveness of interventions for KSIs at junctions

including innovative junction design, feasibility issues, and how recommended

interventions should be used to have the greatest impact on KPI1.

The overall aim of the project is to improve our understanding of the factors

influencing collision likelihood and severity outcomes at junctions on the SRN,

enable greater application of countermeasures with a higher safety impact per

through improving our understanding of the factors influencing collision likelihood

and severity outcomes at junctions on the SRN, the effectiveness of interventions

for KSIs at junctions including innovative junction design, feasibility issues, and

how recommended interventions should be used to have the greatest impact on

KPI1.