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Road Works Signs / Road Cones / Amber Lights Interactive Calculator


Interactive tool to calculate how many temporary road signs and at what size you will need at a road works site. Also shows you how many road cones and amberlights you will need


Refer to the diagram below and enter in the details below

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Basic Site Layout showing Safety Zone, Lead in Taper and explanations



The Works Area
The works area is the excavation, chamber, opening etc, at which you will all be working.

The Working Space
The working space is the space around the works area where you will need to store tools, excavated material, equipment and plant, etc. It is also the space that you need to move around in to do the job.

You must leave enough working space to make sure that the movement and operation of the plant is clear of passing traffic and is not encroaching into the safety zone, or adjacent footway or cycle track.

The Safety Zone
The safety zone is provided to protect you from traffic and to protect the traffic from you. You must not enter the safety zone in the normal course of work. Materials and equipment must not be placed in the zone. You will need to enter the safety zone only to maintain cones and other road signs.

The Safety Zone is made up of:

  • The length of the lead-in taper of cones (T).
    This will vary with the speed limit and the width of the works.


  • The longways clearance (L)
    This is the length between the end of the lead-in taper of cones and the working space.
    It will vary with the speed limit


  • The sideways clearance (S)
    This is the width between the working space and moving traffic. The sideways clearance is measured from the outside edge of the working space to the bottom of the conical sections of the cones on the side nearest to the traffic. It will vary with the speed limit.


  • The Exit Taper
    This is always at 45 degrees to the kerbline or road edge.






 

 
 
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