The Direct Vision Standard (DVS) operated by Transport for London (TfL) is changing

From October 2024 vehicles rated 0,1 or 2 stars must be equipped with the more advanced Progressive Safe System (PSS). We can help ensure you are ready for the change

The Direct Vision Standard (DVS) operated by Transport for London (TfL) is changing to the Progressive Safe System (PSS)


From October 28th 2024 Heavy Goods Vehicles (HGV) over 12 tonnes and currently rated 0,1 or 2 stars must be equipped with the more advanced Progressive Safe System (PSS) to improve indirect vision and obtain a PSS compliant Safety Permit to continue operating within Greater London without incurring penalties. Vehicles with a star rating of 3, 4 or 5 and registered with TfL are considered compliant with PSS and certain specialist vehicles may be fully or partially exempt from PSS.

Vehicle DVS Star Rating Issued prior to 27 Oct 2024 (pre-PSS) Issued from 28th October 2024 - post PSS Required Safety Measures
0 Expires midnight 27th October 2024 Expires midnight 27th October 2030 PSS from 28th October 2024 onwards
3 Valid 10 years from issue date Recommended not compulsory
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Direct Vision and Vehicle Star Ratings

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What you need to do to comply with the Progressive Safe System (PSS)

It is extremely important that the process to comply with PSS and receive your HGV Safe Permit is started in good time.


Step 1 - Determine the star rating for your vehicles

We will provide your vehicle’s star rating, simply click on the link. TMS2 will contact the vehicle manufacturer to obtain the star rating on your behalf. Please note that this may not take into account post OEM bodywork conversions or aftermarket devices.


Request My Vehicles Star Rating

Step 2 – Apply for an HGV Safety Permit complaint with PSS - from 28th October 2024

The Progressive Safe System (PSS) will require evidence of compliance in addition to that listed below:

  • Three, Four and Five Star rated vehicles - ensure TfL have your vehicles star rating registered and apply online for a Safety Permit free of charge, no additional evidence is required.
  • Zero, One and Two Star rated vehicles – current permits will expire in October 2024. These vehicles will need to be fitted with a Progressive Safe System, this will need to be evidenced and a new free of charge HGV Safety Permit application made before the expiry date

Guidance for obtaining an HGV Safety Permit - Transport for London (

Direct Vision and HGV Safety Permits & Progressive Safe System (PSS)

The Progressive Safe System (PSS) – summary


The TMS Solution for full PSS Compliance

The Progressive Safe System regulations apply to all HGVs with a GVW over 12 tons. Vehicles currently rated 3 stars or above and registered with TfL under DVS regulations will be accepted as compliant with PSS however vehicles rated 2 stars or less will need the additional advanced technology safety equipment installed by October 2024.

It is strongly recommended that drivers undergo training in view of the major changes in technology required by PSS. Unlike the previous Safe Permit, PSS incorporates advanced technology to predict collisions based on the trajectory of both the vehicle and those of vulnerable road users (VRU), this includes an entirely new alarm and alerts strategy not previously experienced by drivers.

PSS - Summary Requirements

  1. A fully operational camera monitoring system must be fitted to the nearside of the vehicle, to completely eliminate the remaining blind spot at the nearside
  2. Class V and VI mirrors, or a camera monitoring system that replaces the mirrors, or a combination of both, must be fitted to the front and nearside of the vehicle (in compliance with UNECE Regulation 46), click for simplified DVLA guidance (see section 08 - Indirect Vision)
  3. A blind spot information system, with active sensors that gives adequate warning to the driver of the presence of a vulnerable road user, must be fitted to the nearside of the vehicle in accordance with the technical specifications for the PSS. A vehicle that demonstrably complies with UNECE Regulation 151 will meet this requirement*
  4. A moving off information system must be fitted to the front of the vehicle to warn the driver of the presence of a vulnerable road user, in accordance with the technical specifications for the PSS. A vehicle that demonstrably complies with UNECE Regulation 159 will meet this requirement*
  5. Side guard protection must be fitted to both sides of the vehicle, except where this is demonstrably impractical (in compliance with UNECE Regulation 73 on lateral protection devices) click for simplified DVLA guidance (see section 42 - Lateral Protection)
  6. An audible vehicle manoeuvring warning must be fitted to provide an adequate audible warning to vulnerable road users when a vehicle is turning left
  7. External pictorial stickers and markings must be displayed on vehicles to provide adequate visual warning to vulnerable road users of the hazards present around the vehicle
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DVS vs UNECE Regulations 151 and 159

Please note that the PSS Direct Vision standard exceeds that of the UNECE regulations in term of detection areas. EU General Safety Regulations (GRS) regulations (Type Approved) apply to all OEM vehicles from July 2022. Vehicles meeting the UNECE standard will be accepted under PSS however aftermarket (retrofit) PSS installations must meet the higher PSS Direct Vision standard.

The TMS2 Solution for full PSS Compliance

The TMS2 PSS system is an intelligent aftermarket system which enables legacy fleet to obtain the HGV Safety Permit. It can be used in conjunction with existing camera- based systems and replaces and updates the existing detection system.

Our system addresses the TfL PSS safety regulations by ensuring the driver is made aware of the presence of vulnerable road users (VRUs), such as pedestrians and cyclists, who are approaching or within the close- proximity blind spots of the vehicle e.g. either directly in front of the vehicle or in the nearside blind spot.

Radar and cameras are the two main technologies commonly employed to meet the TfL PSS standards. These are two different sensor technologies with distinct advantages and limitations. After extensive research we have adopted a radar-based system as our solution, based on the following reasons:

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Weather Conditions

Radar is less affected by adverse weather conditions such as heavy rain, fog, or snow compared to cameras. Radar waves can penetrate through these weather elements, providing more reliable detection in challenging environmental conditions.


Low Light Conditions

Radar is not dependent on visible light, making it effective in low-light or night-time conditions where cameras might struggle. This characteristic is crucial for ensuring continuous detection and tracking of VRUs in various lighting scenarios.


Object Speed and Range

Radar is generally better at measuring the speed and range of objects accurately, especially at longer distances. This capability is important for detecting fast-moving or distant VRUs, providing more time for the system to react appropriately. This is a key feature for predicting the trajectory of cyclists and pedestrians in order to predict an imminent collision.


Reduced Sensitivity to Occlusion

Radar can be less sensitive to occlusion caused by obstacles, such as other vehicles or structures, which might obstruct a camera’s line of sight. This can be advantageous in complex urban environments where VRUs may be partially hidden by surrounding objects.


Non-Visual Information

Radar provides non-visual information about the environment. It can detect objects even if they do not have a distinct visual appearance, making it useful for detecting VRUs who may not be easily visible to a camera due to clothing, lighting conditions, or other factors.

Our system comprises an Artificial Intelligent (AI) based device, two radar modules including time-of-flight and doppler, an alert system for the driver and audible warnings for the VRU. The AI system is capable of accurately distinguishing between VRUs and artefacts including static street furniture and other vehicles. This reduces the number of false positive alerts given to the driver, therefore reducing the potential of cognitive overload.
The system has been designed to detect the presence of VRUs which are either stationary or moving in a trajectory which would place them within the critical blind spot areas of the vehicle. For example, the system tracks a VRU to predict whether they will cross in front of the vehicle from either the nearside or offside direction. This includes monitoring VRUs who are travelling between 3 km/h and 5 km/h and cyclists travelling between 5 km/h and 20 km/h. Furthermore, the system can provide feedback to the driver within 1.4 seconds (the driver reaction time).
When a VRU is detected, the system will issue one of two levels of warnings to the driver; either an informational or warning signal which indicates the level of severity.

  • When stationary or ‘at rest’, the system will give an informational signal to prompt the driver if a VRU enters the critical blind spots of the vehicle. The state ‘at rest’ can be determined by the application of the handbrake or footbrake. Our system improves upon this by analysing radar information using AI to detect movement relative to the environment.
  • When the vehicle is moving, the system will issue a warning signal to the driver which indicates an imminent collision is likely. Even if the vehicle subsequently becomes stationary, the warning signal will persist until the VRU is no longer present.
  • When both the vehicle and VRU are moving in parallel with each other, then an information signal is given. This is elevated to a warning system when the trajectory between the vehicle and VRU indicates there may be a collision. Again, where a warning signal is given it is not cleared until the VRU is no longer present.

The system cannot be disabled by the driver and the system will alert the driver to loss of functionality.

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  • Intelligent (AI Based) radar system located within the vehicle.
  • An in-cab alert system for the driver drawing attention to the VRU and outside environment.
  • Two radars to ensure the full close-proximity blind spots are covered.
  • An audible warning to alert the VRU of the vehicle’s presence, which can be turned off during sensitive hours.
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Alternatively should you wish to obtain your DVS star rating direct from TfL use the following link

If TfL do not hold a star rating for a particular vehicle you can contact the vehicle manufacturer for an email stating the star rating which then has to be supplied to TfL to update their records (link below) - search for "Contact your manufacturer"