Road Conditions Terminology

Gross Vehicle Mass (GVM)

Vehicles with a GVM exceeding 4.5 tonnes.

When it is unladen.

<p>To ensure public safety by closing roads temporarily between 6pm and 6am.</p> Signup and view all the answers

<p>A motor vehicle with a GVM less than 4.5 tonnes.</p> Signup and view all the answers

<p>Traveling until the associated restrictions are revoked.</p> Signup and view all the answers

<p>4, 7, or 13 axles.</p> Signup and view all the answers

<p>The mass of an axle or axle group for heavy vehicles.</p> Signup and view all the answers

<p>A detour is an alternative route available for traffic during a temporary closure of a road or part of it.</p> Signup and view all the answers

<p>Impassable conditions occur when access along a section of road is affected by flooding or obstructions.</p> Signup and view all the answers

<p>A lane closure refers to the temporary closure of one or more traffic lanes where traffic control devices are in place.</p> Signup and view all the answers

<p>It is a restriction placed on heavy vehicles to control axle group loads and vehicle sizes to protect the road.</p> Signup and view all the answers

<p>'With Caution' indicates that part of the road may have deteriorated, requiring drivers to exercise due care.</p> Signup and view all the answers

<p>A High Clearance 4WD is a light vehicle with two axles designed for on and off-road use with sufficient clearance.</p> Signup and view all the answers

<p>A 'Road Closed' sign indicates that vehicles are not permitted to pass, with barriers in place.</p> Signup and view all the answers

<p>A High Clearance vehicle is a light vehicle capable of traveling over rough and uneven surfaces with greater clearance than standard cars.</p> Signup and view all the answers

<p>A slippery surface is one that becomes slick in wet conditions or due to fuel or material spills.</p> Signup and view all the answers

<p>A stream crossing is a natural watercourse intersecting the road, with sealed roads typically featuring bridges or culverts, while unsealed roads might not have any structures.</p> Signup and view all the answers

<p>Washouts are steep, irregular grooves in the road surface caused by erosion from water, which can compromise road safety by creating dangerous driving conditions.</p> Signup and view all the answers

<p>Formed roads are unsealed and constructed above the natural surface using local materials, whereas gravelled roads are formed and strengthened with quality gravel.</p> Signup and view all the answers

<p>Unsealed roads are those without a bituminous surface and can be classified as formed, gravelled, or unformed based on their construction and condition.</p> Signup and view all the answers

<p>Certain vehicle types may be restricted from using steep grades due to safety concerns.</p> Signup and view all the answers

<p>'Boggy Conditions' refer to a wet and soft unsealed road surface that can cause vehicles to get bogged down.</p> Signup and view all the answers

<p>'Loose Surface' can reduce vehicle traction, making it difficult for vehicles to maintain control.</p> Signup and view all the answers

<p>'Changed Traffic Conditions' refer to temporary or permanent modifications to road usage such as new speed limits or road layout changes.</p> Signup and view all the answers

<p>'Pot Holes' are bowl-shaped depressions in the road surface caused by the loss of pavement material.</p> Signup and view all the answers

<p>'Rutting' indicates a longitudinal deformation of the pavement due to repeated vehicle wheel pressure.</p> Signup and view all the answers

<p>'Water Over Road' suggests the presence of water on the road, requiring caution despite the road being trafficable.</p> Signup and view all the answers

<p>'Tight Bends' can limit the maneuverability of larger or heavier vehicles, potentially creating hazards.</p> Signup and view all the answers