Road Construction Traffic Control

Factors Affecting for Traffic Control in Road Construction Project

Factors affecting for traffic control in a construction of road project will vary  according to following conditions which are prevail.   We have to decide traffic control arrangement according to suit different conditions in  road construction project . When deciding what provisions for traffic are necessary the following factors should be considered –

•    Width  of  the  road  formation – Is  there enough room for the traffic  and  plant  to  operate safely and efficiently at the same time, can the shoulders be used for a  second traffic lane .

•    Traffic  density – How  much delay  in  construction  is the   traffic   likely  to cause  and vice versa.

•    Percentage of heavy vehicles – (remember things such as sugar or grain harvests).

•    Terrain – Shape and composition of the ground – e.g. black soil, rocky outcrops, swamps.

•    Seasonal  –  Shape  and  composition  of  the  ground  –  e.g.  black  soil,  rocky  outcrops, swamps.

•    Seasonal influences – Wet season, drought (water shortage).

•    Safety – job employees and the public.

•    Time – Comparison between alternatives.

•    Cost – Comparison between alternatives.

Above mentioned factors affecting for traffic control  in road construction project can be vary with special  situations and that should be decide to suit all the site conditions.

Road Construction Traffic Control

Traffic Control During Construction

In any situation of road construction works progress, in which the motorist may be denied the safe usage of the full carriageway, some provision for traffic is essential. This road  traffic control  applies in both construction and maintenance.

The safety of the motoring public and of the job employees, is the key consideration in making adequate provision for road traffic. Both groups are entitled to equal consideration. Road Traffic may be slowed down, halted and held or diverted according to the job circumstances. However when any such action are taken, in addition to safety, public relations must be taken into consideration.

Two Lane Road Traffic Control

The Construction managers job is to all times aim at keeping at least two traffic lanes open. At least two traffic lanes should always be available during the hours of darkness. There are a number of ways of doing this

Side tracking – A side track is defined as a specially constructed road or track by-passing an obstacle, roughly parallel to the main route, i.e. side tracks and so called detours on rural roads.

Detouring – A detour is defined as a diversion of traffic using existing roads or streets, as in an urban situation.

• Widening and/or compacting existing shoulders to create an additional temporary traffic lane.

• Completing work each day to a stage where the job can be opened to traffic at night and weekends. As a example paving work

One Lane Road Traffic Control

The one lane road traffic are considered Where it is not practicable to keep two traffic lanes open, flagmen will always be used to control the traffic of road on the approaches to and through the job site. The some of the key factors for the use of flagmen are-

• When traffic is restricted to the use of one lane, flagmen will ALWAYS be used.

• On single lanes not exceeding 30 m in length one flagmen may be used.

• On single lanes exceeding 30 m in length two flagmen will always be used, each to be visible to the other and one to be nominated as controller. In cases where visibility between flagmen is not possible, small radio transceivers should be used. Alternatively a third flagmen, with visibility to the other two, may be used.

One lane  road traffic  is to be converted to two lanes road traffic for the hours or darkness and at weekends, when the job is unattended, i.e. the lane under construction is to be opened up.

Traffic Control

Traffic Control- Center Line Setting Out

In accordance with RDA, Traffic Control Methods the following traffic operation procedure          would be adapted in order to control traffic.
• Men at work 75m-100m ahead sign boards would be placed on both left hand side of the road.
• 25m away from men at work sign Narrow Road/one lane traffic sign would be placed in order to notify the drivers with regard to road situation.
• Working area will be cordon with traffic cones to identify survey setting out to oncoming traffic on both sides.
• “One way Traffic ahead” sign boards would be placed 90m ahead of working area in order to notify oncoming drivers.
• Traffic priority board would also be placed for controlling traffic.
• Traffic controllers would be deployed on both sides in order to control the traffic.
• Photographs would be taken to disseminate and maintain traffic safety records.
• Specially any place where the road is narrow, allowing of one way traffic would be adopted.