Worksite traffic management uses temporary signage that provides warning, guidance, instructions and information to road users.
The signs for worksites are classified into the following categories:
3.2.1. Signs for Advanced Warning
– ROADWORK AHEAD (T1-1) used to give advance warning of any roadwork that creates a temporary hazard where works are left overnight. This sign is generally not necessary at short term works, but may be desirable for short term works in high speed roads or where additional advance warning is considered necessary.
– BRIDGEWORK AHEAD (T1-2) used to give advance warning of any bridge construction or repair that creates a temporary hazard where works are left overnight. This is used instead of sign T1-1 if working on a bridge
– ROAD MACHINERY AHEAD (T1-3) Shall be used where machinery working on or adjacent to the roadway, may create a hazard.
– GRADER AHEAD (T1-4) Where a grader alone is engaged in shoulder or roadside maintenance, the alternative sign GRADER AHEAD may be used.
– WORKMEN AHEAD (Symbolic) (T1-5) used to give advance warning for the protection of workers on or adjacent to the path of traffic. On low speed gravel road the signs may not be required if vehicle mounted rotating lamps on the works vehicle can be seen for at least a distance of 2D, or if the works area is well clear of the roadway. This sign shall always be used when a Traffic Controller is controlling traffic.
– ROADWORK NEXT … km (T1-24) used to give advance warning of any general roadworks that extend over a number of kilometers in more than one work area. The signs ROADWORKS AHEAD (T1-1) or BRIDGEWORK AHEAD (T1-2), as appropriate, together with other appropriate advance signs, shall be erected at the first and any successive separate section of the road on which works are in progress.
– ROADWORK ON SIDE ROAD (T1-25) used in advance of an intersection to warn of roadwork activities on the side road.
– NEXT 2 km (T1-28) used in conjunction with either the WORKMEN AHEAD (T1-5) sign, the ROAD MACHINERY AHEAD (T1-3) or the GRADER AHEAD (T14) signs where they are used to warn of a frequently changing work area.
– END ROADWORK (T2-16, T2-17) used at the departure end of a work area. The sign is not necessary on short term works, mobile works or where an END DETOUR (T2-23) sign is used.
3.2.2 Signs for Regulatory Control of Traffic
– STOP / SLOW Hand Held Signs (R6-8, T7-1) used by a roadwork Traffic Controller to provide temporary traffic control. This may include situations where there is a temporary obstruction, where traffic needs to be stopped for machinery to cross or enter a road, where one lane of a two-way road or bridge is closed, or where traffic needs to be stopped temporarily for blasting.
– STOP / GO Flags used by a roadwork Traffic Controller to provide temporary traffic control. Red flag is used to stop traffic and the green flag to allow traffic to proceed.
Red and green flags are used by a roadwork Traffic Controller to provide temporary traffic control. They may be suitable in low traffic volume situations, generally in rural areas, in situations where there is a temporary obstruction, where traffic needs to be stopped for machinery to cross or enter a road, where one lane of a two-way road or bridge is closed, or where traffic needs to be stopped temporarily for blasting.
The red flag is used to stop traffic and the green flag to allow traffic to proceed.Flags shall be a minimum of 600mm square and made of material securely fastened to a handle approximately 900mm long. Flags shall be retroreflective when used at night. The free edge of the flag may need to be weighted so the flag will hang vertically, even in strong wind
– PREPARE TO STOP (T1-18) used to give advance warning where traffic may need to comply with the directions of a roadwork Traffic Controller or where portable temporary traffic signals are being used at a worksite.
– SPEED RESTRICTION (R4-1) used to create a temporary roadworks speed limit where this is warranted by traffic and site conditions.
– ROAD WORK (R4-3) used with a SPEED RESTRICTION (R4-1) sign.
– SPEED RESTRICTION – if a speed restriction sign is installed for roadworks it shall be either:
– Accompanied by a supplementary ROAD WORK (R413) sign, or
– Be installed at the advance warning ROADWORK AHEAD (T1-1) sign.
– END SPEED RESTRICTION (R4-12) is used if the road does not have a speed limit signed and it may be unsafe to travel at a high speed e.g. a gravel road.
– DE- RESTRICTION (R4-2) used if the road did not have a speed limit signed and it is reasonably safe to travel at a higher speed e.g. a high standard rural road.
3.2.3. Signs for Detours
– DETOUR AHEAD (T1-6) used to give advance warning of a detour from the normal alignment for a section of the road where works are being carried out. The detour may use other roads or a side track especially constructed for the purpose.
– DETOUR (Left or Right) (T5-1) used to indicate the direction and point at which traffic should leave the through route to detour via existing roads or a side track which by-pass the worksite or an obstruction in the main route. On roads carrying fast or heavy traffic, or where sight distance is limited, it will usually be necessary to use the advance sign, DETOUR AHEAD (T1-6) in conjunction with this sign.
– Detour Marker (T5-6) used to guide and reassure detoured drivers travelling on a detour route.
– LOCAL TRAFFIC ONLY (G9-40-2) used at detours where local traffic is permitted to enter the work area.
– END DETOUR (T2-23) used to indicate that a detour has ended.
– No Lines Do Not Overtake Unless Safe (T3-12) used at locations on two way roads where barrier lines would normally be installed or where it may be hazardous to overtake due to limited visibility.
– Traffic Hazard Ahead (T1-10) a non-specific warning sign to be used in an emergency such as an accident ahead or a hazard on the roadway.
– Trucks Entering (T2-25) used to warn of trucks entering or crossing at a frequency that could cause a hazard.
3.2.4. Signs for Lane and Road Closures
– ROAD CLOSED (T2-4) used to completely close a road to traffic. Barrier boards would generally be used with the sign to stop access.
– LANE STATUS (T2-6-1 and T2-6-2) used to give advance warning of where a lane or lanes are closed on a multilane roadway.
– Arrowheads – lanes open to traffic.
– Bars – lane or lanes that are closed to traffic.
Lane closures which require complex driving maneuvers may require special signs incorporating curved arrows
3.2.5. Signs for Blasting
Blasting at a roadworks requires specific signs to supplement other signs approaching and leaving a worksite. Traffic at these sites would be stopped using Traffic Controllers and STOP signs.
– Blasting Area Switch Off Radio Transmitters (T4-2) used when electronic detonators are to be handled or used within 100m of a road. It shall be displayed at the edge of the roadway on all road approaches at a distance of not less than 200m from the handling or blasting site.
– End Blasting Area (T4-3) used a minimum of 200m beyond the blasting or handling area to indicate where transmitters can again be used.
3.2.6. Signs for Pedestrian Control
– Pedestrians (T8-2 L or R) used to direct pedestrians around the worksite or via a particular path
– Pedestrians Watch Your Step (T8-1) used where works could be hazardous for pedestrians because of roughness, level difference, or loose or other surface material.
– Use Other Footpath (T8-3) used where works make it necessary to deny use of the footpath on one side of the road. The Pedestrians (T8-2 L or R) sign shall be used as necessary in conjunction with this sign.