Roadside Unit Installation

Roadside units have been designed to be easy to install in 3 simple steps:

  1. Note Serial Number
  2. Fitting
  3. Registration/Activation

Serial Number

Before you start, make a note of the Roadside Unit serial number.  This unique code can be found on the label on the rear of your roadside unit.  You'll need this number to be able to register and activate the unit.


Site location

Selection of where to install the monitoring unit is crucial to the successful operation of AutoSpeedWatch.  Please follow this guidance carefully before deciding the best location. Typical installation  

The area being monitored may need to have “Speed Camera” warning signs, although generally it seems that this requirment has been removed; check with your local authority, and you should have the permission of the local council and/or the Highways Agency, for attaching the monitoring box to any roadside furniture/poles/etc.   

The unit needs to be placed as close as possible to the carriageway without causing a strike hazard to vehicles, pedestrians, or other road users, and should be less than 4m from the centre of the lane being monitored.  If mounted on or  near a pedestrian footpath, then ensure that the monitoring box is placed to prevent injury to people passing (at a height of 2.2m or more).  It should also be at least 60m from a change of speed boundary, and have at least 40 metres of reasonably straight line-of-sight visibility of the traffic, both before and after.  Check that foliage will not obscure its view as it grows.  It must be mounted on a vertical pole, or similar, so that the top of the unit is horizontal.  The unit is IP54 rated meaning that is designed to prevent harmful ingress of water spray provided that is installed according to these instructions.

The unit requires a good view of the sky to recharge with the solar panel in direct sunlight.  The installation position should therefore be free of overhanging bushes or trees, or any building, structure or other object that might reduce or shade sunlight reaching the top of the unit.  The unit also needs to communicate over the mobile phone network, and should not be in an area of poor/nil coverage.

The unit is typically mounted to a existing road sign pole, but can be any sturdy static structure with suitable brackets.  

Most installations are on the nearside of the carriageway.  Should you wish to install the unit on the offside of the carriageway (e.g. a central reservation) then a right-hand option may be produced if there is sufficient interest; please enquire.  

Please note the units need to be permanent installations, and should not be re-located.

How to install

You must carefully assess the installation for risks and mitigate any risks to ensure you, and others, remain safe.  Do not work at height.  Have someone with you with a mobile phone.  Wear high visibility jackets.  Warn traffic as necessary.  Follow the guidance and work practices given by the Health and Safety Executive (see 

If the location is designed for pedestrian access (i.e. a pavement, pathway, etc) and is protected from traffic by a kerb or barrier, then you should be able to self-install with due care.  You must comply with the Safety at Street Works
and Road Works codes of practice given in  If the location is not protected (such as a verge) then you will need 'Chapter 8' competencies for working near a roadway, or employ someone who is Chapter 8 qualified.  We have a list of Chapter 8 trained installers that may help you.  

A special security bit is used on the fixing band to attach the unit. Use this bit in combination with the Hex Ratchet Spanner as follows:

1. Feed the stainless steel fixing band supplied though the rectangular slot on the mounting bracket at the back of the unit.

2. Position the unit against the pole at the correct height with the camera window facing away from oncoming traffic (i.e. to the rear of traffic that has passed), and tighten the fixing to just hold the unit in place.

3. Swivel the unit on the pole so that the arrow on the base of the unit aligns with the centre of the lane being monitored at a point 10m after the unit.

4. When correctly aligned gently tighten the fixing band by up to 1 more turn – just until the unit is firm.  Do not over-tighten the fixing, as this WILL damage the case. Check that the unit is securely attached. 

5. Make a note of the exact GPS coordinates of the unit (Google maps is good for this).

6. Make a note of the distance from the centre of the carriageway to the unit (see green line on “Typical Installation” picture above).

That’s it.  Installed!


Your community speedwatch coordinator should register and activate your roadside unit, but they can subsequently invite volunteers from their community speedwatch group to help with the data produced.

If you're an existing registered My AutoSpeedWatch coordinator (i.e. you're a coordinator of previously installed units) then activate your new unit from your My AutoSpeedWatch account.

If this is the first roadside unit you've installed, please register and activate your roadside unit now.  We will then complete your registration and send you login details for your account.