Key takeaways
- Every work zone needs planned entry and exit points shown on the TGS or vehicle movement plan, not left to each driver.
- Vehicles should enter and leave in the direction of traffic, slow down inside the closure where possible, and never reverse in from a live lane.
- Each gap in the delineation is also a way in for errant vehicles, so keep gaps as narrow as practical and close them when not in use.
- Exit points need sight distance to approaching traffic and a clear procedure for who decides when a vehicle can re-join.
- Delivery drivers and subcontractors who were not at the pre-start are the most common source of unplanned movements, so brief them before they arrive.
A work zone access point is the planned place where site vehicles leave live traffic to enter the work area, or leave it to re-join traffic. Safe access points are shown on the traffic guidance scheme, used in the direction of traffic, give following drivers warning and give exiting drivers a clear view. They should never be improvised from the live lane.
Most work zone designs spend a lot of attention on how public traffic passes the site and very little on how the site's own vehicles get in and out. Yet every truck, ute, delivery and piece of plant crosses the boundary between the protected work area and live traffic at least twice a shift. This guide covers how to plan and run those movements. It is general information, not engineering or safety advice. The TGS must be prepared by a suitably qualified person, and your state's requirements and the approved plan come first.
Why access points deserve their own plan
Access movements combine the worst features of road works: big speed differences between slow site vehicles and through traffic, drivers making sudden moves, and gaps in the delineation that weaken the separation the TGS relies on. Common problems include:
- trucks braking hard in the live lane to turn into the closure
- vehicles reversing into the work area from the traffic lane
- exiting vehicles pulling out with poor sight lines over a crest or bend
- members of the public following a truck through a gap in the cones
- delivery drivers stopping in the live lane while they phone the site
- U-turns across the road to get back to the depot
The Austroads guide for field staff (AGTTM Part 6) includes the method of entering and leaving the worksite in the toolbox content to cover with the principal contractor, alongside site driving and parking rules. That is a good hint: access belongs in the plan and the briefing, not just in the drivers' heads.
Where access points should go
The approved TGS or vehicle movement plan should show where entry and exit happen. When reviewing it, or when the site does not match it, check the following.
| Design check | What good looks like |
|---|---|
| Direction | Vehicles enter and leave in the same direction as traffic |
| Entry location | After the taper, where a vehicle can move into the closed lane without crossing cones |
| Slowing down | Deceleration happens mostly inside the closed lane or shoulder, not in the live lane |
| Warning | Following drivers have advance signs and enough distance to react to a slowing vehicle |
| Exit location | Downstream end of the work area, with room to build speed off the live lane where possible |
| Sight distance | Exiting drivers can see approaching traffic, and approaching drivers can see them |
| Gap width | Gaps in delineation only as wide as the largest vehicle needs |
| Conflicts | Access points clear of traffic controller stations, escape paths and workers on foot |
| Emergency access | Emergency vehicles can still reach the work area and people can get out |
Sight distance is the one people underestimate. An exit point just past a crest or on the inside of a bend can look fine on a plan and be dangerous on the day. If you want a quick sense of the distances involved, the free stopping sight distance calculator shows how far a vehicle travels before it can stop at a given speed. Any change to the access arrangement still needs to go through the person who prepared the TGS.
Entering the work zone
A good entry sequence is predictable for everyone behind the site vehicle:
- Plan the arrival. The driver knows the entry point before leaving the depot or supplier, not when they see the first sign.
- Signal early. Indicate well before the entry so following drivers understand what is happening.
- Move into the closed lane in the direction of traffic. Do not cut through the taper or swing across from the far lane.
- Slow down inside the closure. Where the scheme allows, the closed lane or shoulder is the place to lose speed.
- Stop clear of the gap. Pull forward so following traffic is not drawn in after you and the next vehicle has room.
- Follow the site's internal route. Inside the zone, the vehicle movement plan applies, including speed limits, turning points and where workers on foot are.
Leaving the work zone and re-joining traffic
Exits are where site vehicles move from protected space back into the stream, often slowly and often in a heavy vehicle.
- Use the planned exit. Usually at the downstream end of the work area, in the direction of traffic.
- Agree who decides. On low-speed roads, a traffic controller may hold traffic briefly to let a heavy vehicle out, if the TGS and briefing provide for it. On high-speed roads and motorways, controllers must not stand in live lanes, so exits rely on design, gaps in traffic and the driver's judgement within the plan. See the motorway traffic control guide for how high-speed sites differ.
- Check before moving. Exiting drivers look for approaching traffic, cyclists and pedestrians, and for anything the work has left on the road.
- No U-turns across lanes. Return trips should use the road network, turning where it is safe and legal.
On stop/slow sites, a truck leaving into the shuttle lane is part of the traffic movement. The controller must know it is coming and release it as part of the sequence, never on the driver's own initiative.
Gaps in the delineation: the access point's weak spot
Every gap in a cone or barrier line is a way in, for site vehicles and for errant ones. Practical controls:
- Keep gaps narrow. Only as wide as the largest vehicle needs, with the cones either side correctly placed.
- Close them when not in use. Especially during breaks, at night and when the work area is unattended.
- Watch for followers. Drivers sometimes follow a works truck through a gap, assuming the lane is open. A controller or worker positioned to warn them, and clear signage, help.
- Inspect them. Access gaps get knocked about more than any other part of the set-up. Include them in the inspections done at the start, during and at the end of each shift.
- Barriered sites. Openings in a safety barrier system need the barrier ends treated as the designer specified. Never open a barrier line on site without the designer's arrangement.
Our work zone intrusion guide covers the wider controls for vehicles that should not be in the work area.
Deliveries, subcontractors and visitors
The pre-start covers the crew who were there at 6 am. The problems usually come from people who were not: concrete trucks, asphalt trucks, hire deliveries, inspectors and subcontractors arriving mid-shift. Brief them before they arrive.
Send with every booking or call:
- the entry point, described with a landmark or chainage, and which direction to approach from
- the exit point and the return route
- where to wait if the site is not ready, off the road and clear of driveways
- the site contact's mobile number and radio channel if used
- site rules: speed inside the zone, no reversing without a spotter, PPE on exit from the cab
Then confirm in person on arrival. The site visitor briefing guide has a short format that works for drivers who will be on site for twenty minutes, and the construction site entrance guide covers off-road sites with gates.
Common access point mistakes
| Mistake | What goes wrong | Better approach |
|---|---|---|
| Access left off the TGS | Each driver picks their own way in | Ask the designer to show entry and exit points |
| Braking in the live lane | Rear-end crash risk for the site vehicle | Slow down inside the closed lane where the scheme allows |
| Gap left open all shift | Errant or following vehicles drive in | Close gaps during breaks and when not in use |
| Exit just past a crest | Driver pulls out into traffic they cannot see | Move the exit, or change the TGS through the designer |
| Ute parked in the entry | Trucks stop short and block the lane | Keep entry and the first vehicle space clear |
| Night access unlit | Drivers miss the entry and reverse back | Light the access point without dazzling traffic |
Access point checklist for the pre-start
- Entry and exit points identified on the TGS or vehicle movement plan
- Points walked and confirmed on the ground, including sight lines both ways
- Advance warning in place for following drivers where the TGS requires it
- Gaps in delineation set to the right width, with a plan for closing them
- Traffic controller stations and escape paths clear of access routes
- Procedure agreed for heavy vehicles exiting, including who releases them
- Deliveries and subcontractors sent access instructions in advance
- Holding area identified off the road for early arrivals
- Emergency vehicle access confirmed
- Rule briefed: no reversing in from a live lane, no U-turns across lanes
Next steps
Look at your next three jobs and check whether the TGS shows where site vehicles get in and out. If it does not, ask the designer before mobilisation, not on the day. For national guidance, see Austroads, and for workplace traffic principles that also apply inside the zone, Safe Work Australia. NSW projects should check which current Transport for NSW document the contract specifies.
Frequently asked questions
What is a work zone access point?
It is the planned place where site vehicles leave live traffic to enter the work area, or leave the work area to re-join traffic. It should be shown on the traffic guidance scheme or vehicle movement plan, with enough sight distance, warning for following drivers and a clear rule for who controls each movement.
Should site vehicles enter a lane closure through the taper?
Generally no. Driving through the taper disturbs the cones that guide traffic and forces a sharp move from a live lane. Most schemes provide an entry point where vehicles move into the closed lane in the direction of traffic and slow down inside it. Follow the access arrangement on your approved TGS.
How do trucks safely exit a road work zone?
Use the planned exit point, usually at the downstream end, in the direction of traffic. The driver needs a clear view of approaching vehicles, room to build speed off the live lane where possible, and a known procedure, such as a traffic controller holding traffic on low-speed roads. Never reverse or U-turn across lanes.
Who briefs delivery drivers on site access?
The principal contractor or traffic management company should arrange it, ideally before the driver arrives. Send the entry point, exit point, holding area, contact number and site rules with the booking, then confirm in person on arrival. Drivers who were not at the pre-start are a common source of unplanned movements.
Can members of the public follow a works vehicle into a closure?
It happens. Drivers sometimes follow a truck through an access gap, assuming the lane is open. Keep gaps narrow, close them when not in use, position signs and a controller where needed, and stop the work vehicle clear of the gap so following traffic is not led into the work area.