Page:UK Traffic Signs Manual - Chapter 8 - Part 2- Traffic Safety Measures and Signs for Road Works and Temporary Situations) - Operations 2009.pdf/155



This vehicle should have the following features:
 * a 3 tonne minimum on-the-road weight;
 * a van-type vehicle with full height rear retroreflective chevron markings (a pickup-type vehicle will not be suitable). Note: If the vehicle is not signed with these conspicuous markings then a vehicle to the same specification as the closure vehicle should be used; see paragraph O10.7.1.O10.7.1;
 * a conspicuous colour (yellow is recommended);
 * a roof-mounted amber light bar with a minimum of two independent light sources, towards the rear of the vehicle complying with Section O5.3; and
 * a sign to diagram 7404 "HIGHWAY MAINTENANCE" (x-height: 100 mm, character height: 140 mm); see also paragraph O5.2.8.

In Northern Ireland, the hard shoulder vehicle specification is to be the same as for the lane closure vehicles; see paragraph O11.8.2.

There are two options for the type of works vehicle that is used to temporarily close a slip road. The choice of which option is used will depend on the nature of the slip road and will be the result of a risk assessment; see paragraph O11.5.3. The options are:
 * Option A: The vehicle should have the same features as the hard shoulder vehicle; see paragraph O11.8.4.
 * Option B: The vehicle shall have the same features as an Impact Protection Vehicle (as specified in paragraph O5.5.5) except that signing shall be in accordance with Figure 11.2.

This vehicle should have the following features:
 * a conspicuous colour (yellow is recommended);
 * a roof-mounted amber light bar with a minimum of two independent light sources, towards the front of the vehicle complying with Section O5.3; and
 * a sign to diagram 7404 "HIGHWAY MAINTENANCE" (x-height: 50 mm, character height: 70 mm); see also paragraph O5.2.8.

Good communications are vital for the efficient and safe operation of the Mobile Carriageway Closure technique. A dedicated radio channel and clear communication will be necessary between:
 * all the vehicles forming the convoy; 153