The document describes a project to identify Advanced Emergency Braking Systems (AEBS) performance gaps by analysing real-world collision data from UK national research and police databases. The study characterised collision cases against the requirements of UN Regulation No. 152, using STATS19 and RAIDS data sources. Cases were filtered for eligibility, then scored against current test scenarios using weighted collision characteristics including subject vehicle speed, target vehicle speed, relative speed, ambient light, and overlap. Results indicate the coverage provided by relevant test scenarios and identify which characteristics may address gaps in AEBS operational performance.

Extended recording from NTSB investigation. The collision sequence involved three alert stages: first alert lasting 5 seconds with visual only or bimodal presentation, second alert lasting 8 seconds with bimodal presentation, and third alert with bimodal presentation and instruction to put hands on the wheel.

Phase 2 of the DfT Brake and Tyre Programme investigated variables affecting particle emissions from brake and tyre wear. Testing compared three vehicles on the same Golf VII platform (ICE, PHEV, EV) at different masses using controlled chassis dynamometer cycles. Results showed regenerative braking in EV and PHEV reduced PM2.5 more effectively than a ~20% mass reduction, while PN10 emissions remained similar across vehicle types and were insensitive to mass or regenerative braking. Testing of brake pad and disc variants found ceramic and low-dust pads gave lowest emissions, while high-mileage pads reduced PM2.5 but not PN10. PM2.5 and PN10 appear governed by different mechanisms, with volatile chemistry of brake pads being critical for PM2.5 emissions.