White Bar Markings

A white bar marking is a non-enforceable line marked on the road across a crossover. It’s purpose is to notify other drivers that vehicles accessing the crossover require the marked amount of space to safely turn in and out of the crossover.

Crossover markings are placed in their locations to advise other motorists that a driveway is in use. They are not provided to improve sightlines or to restrict parking on the carriageway. The white line is normally extended 1.0 metres either side of where the flush (flat) section of kerb ends.

It is important to note that white lines are provided for advisory purposes only. If you have an authorised crossover and a vehicle is blocking it, you may contact the London Borough of Hounslow Parking Enforcement Team:

Tel: 0203 634 8680, Monday to Saturday 8.00am to 11.00pm and Sunday 8.00am to 7.00pm.

Make sure your number is displayed, as you may be called back if the officer is driving. 

How do I apply for a white bar marking?

You will need to have an existing authorised crossover in place. Additionally, you cannot have any current parking restriction lines i.e. yellow lines in front of the crossover. Your application will only be considered if you meet this criteria.  Please download and complete the application form at the bottom of this page. Please do not submit payment with your application.

You can return the fully completed application by post to White Bar Marking Applications, Hounslow Highways Ltd, Jubilee House, Depot Road, Hounslow TW3 1SN. Alternatively, please scan and attach the application form via our contact page. Please select White Bar Marking in the enquiry description field.

What happens once I have submitted my application?

We will carry out an initial site assessment of the crossover for eligibility for a white bar.  Final approval will be given by London Borough of Hounslow who will assess the traffic implications. We will then inform you if your application has been approved. It is only following acceptance of your application that payment will be requested. Current cost of installation is £131.95 per affected property. For commercial use the cost is £262.57.

Please note – should your neighbours’ consent also be required, they too will be charged for the cost of installation.

Installation and post-installation

Once your application has been approved, we will install the white bar marking in front of your authorised crossover within 28 days of confirmation from London Borough of Hounslow that your payment has received and processed. The entire process of application and installation will take approximately 8-10 weeks.

If in future the London Borough of Hounslow introduce parking restrictions in your area, such as yellow lines, CPZ scheme, etc and subsequently removes your white bar marking, you will not be entitled to a refund for the cost of white bar installation.

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