TfL's Direct Vision System rates how well an HGV driver can see directly from the cab. For Greater London it's a legal requirement — here's what operators need to know.
By Zed Aziz
The Direct Vision System (DVS) assesses how well a driver can see directly through their cab windows — crucial for the safety of all road users. Developed by Transport for London (TfL), DVS assigns a star rating from 0 to 5 to heavy goods vehicles based on the direct vision available from the driver's seat.
| Rating | Level of direct vision |
|---|---|
| 0 Stars | No or minimal direct vision |
| 1 Star | Poor |
| 2 Stars | Moderate |
| 3 Stars | Good |
| 4 Stars | Very good |
| 5 Stars | Excellent |
The DVS aims to enhance road safety by minimising blind spots and preventing collisions with vulnerable road users — pedestrians, cyclists and motorcyclists — who are disproportionately involved in fatal accidents with HGVs. Improving direct vision helps by:
The DVS star rating is based on the field of vision through the cab windows, the mirror configuration for blind-spot coverage, and the design and structure of the cab. Typical three-star vehicles feature redesigned lower windows and improved cab structures, optimised mirror systems and advanced glazing to maximise visibility.
For HGVs that don't meet the three-star rating, the PSS is mandatory. It combines several safety technologies:
Implementing DVS and PSS involves several costs. The following are indicative figures from the original guidance:
| Item | Indicative cost |
|---|---|
| Retrofitting windows and cabs | £3,000 – £8,000 per vehicle |
| Advanced mirror systems | £500 – £1,500 per vehicle |
| Blind-spot cameras | £400 – £2,000 per vehicle |
| Proximity sensors | £300 – £1,200 per vehicle |
| Side under-run protection | £1,500 – £3,000 per vehicle |
| Warning systems and alarms | £200 – £1,000 per vehicle |
| Driver training programmes | £150 – £500 per driver |
Adopting DVS and PSS enhances safety, ensures legal operation within Greater London and demonstrates corporate responsibility. Non-compliance results in penalties and restricted access to Greater London, hitting operational efficiency and reputation. To obtain a rating, operators apply through the TfL website with vehicle details and documentation, undergo an assessment against the direct-vision criteria, and receive a rating certificate allowing legal operation in Greater London.
Looking ahead, DVS and PSS are likely to incorporate AI-powered vision systems, advanced driver assistance systems (ADAS) and telematics integration. If you operate in or around London and want help ensuring your fleet meets DVS requirements — alongside your wider maintenance and Operator Licence obligations — our consultants can help. Get in touch.
Book a free, no-obligation consultation and we'll talk through exactly what your fleet needs — no pressure, no jargon.
