CITB HSE MAP Practice Test 2025 – Complete Exam Prep Guide

The essential signage for informing drivers of vehicle positioning during mobile highway works is a directional arrow indicating a 'keep left' or 'keep right' instruction. This signage is critical because it directs traffic to navigate safely around construction zones or areas where vehicles may be positioned on or near the roadway. Clear directional signage helps to manage the flow of traffic, reduces the risk of accidents, and ensures that drivers are adequately informed about how to proceed safely past mobile works.

Using a 'keep left' or 'keep right' arrow helps in guiding vehicles around obstructions and indicates their path clearly, which is particularly important in dynamic environments where changes might occur rapidly. Such signage enhances visibility and understanding for drivers, thus promoting safety for both road users and workers present on site.

In contrast, stop signs instruct vehicles to halt, which may lead to confusion in a mobile works zone where continuous movement is usually preferred to maintain traffic flow. Speed limit signs, while important for controlling speed, do not specifically guide drivers regarding vehicle positioning in a construction context. Overhead warning lights, while useful for alerts, do not provide specific directional information required for navigating around mobile work areas effectively.