Signage and Speed Restrictions

Warning Signs

Potential dangers need to be indicated by suitable warning signs. Drivers and pedestrians should be able to expect that the layout, signs, road furniture and markings on site will be similar to those on public roads. Signs and lighting should be kept clean and well maintained so that they are always visible. Signs that should be considered for use along surface mine haul roads include:

• To identify separate traffic routes and inform who can travel them
• To identify safe waiting (holding) areas for working and operational areas
• To identify hazards such as heavy plant crossing points, overhead obstructions etc.
• To identify traffic controls such as speed limits etc.
• To identify pedestrian routes and crossing points.
• Entry to workshop, maintenance, processing etc. areas

Speed limit Signs

Permanent site roads such as access roads to the office, welfare buildings, workshops, stocking ground, weighbridge etc. should be assessed for suitable speed limits, as invariably these are metalled roads and speeding vehicles can be a problem. Where speed limits are set adequate signage must be in place and these speed limits must be enforced or there is little point in the signage.

When deciding upon speed limits for the operation of plant and vehicles the operator must ensure speed limits are consistent with the prevailing site conditions.  Site conditions can vary considerably over a relatively short period of time, either because of changing weather conditions reducing visibility or by road conditions deteriorating; reducing traction or becoming more slippery or because of the volume of traffic which accelerates wear and tear on bends and other areas where braking takes place.

Signs Prohibiting the Use of Mobile Phones Whilst Operating Vehicles

Using a mobile phone while driving can significantly impair a driver’s reaction time, visual search patterns, ability to maintain speed and position on the road and general awareness of other road users. Using a hands free phone when driving does not significantly reduce the risk to the driver’s reaction time as the problems are caused mainly by the mental distraction and divided attention of taking part in a conversation at the same time as driving.