A heavy goods vehicle fire shut the A23 southbound between Handcross and Slaugham for nearly twelve hours, highlighting why a road closure can extend long after flames are extinguished.
The incident occurred on Sunday 27 September at around 5.30pm when an HGV caught fire on the southbound carriageway. West Sussex Fire and Rescue Service responded with four fire engines and a water carrier. The fire was under control within approximately one hour.
Burnt vehicle and debris keep road closed
Despite the fire being out, the A23 remained fully closed until around 6am the next day. Fire crews and National Highways kept the carriageway shut to remove the burnt vehicle, clear debris, and carry out safety checks. The fire left heat damage and scattered materials across the road, creating hazards that prevented reopening.
One lane reopened briefly shortly after the fire was extinguished to ease congestion, but full closure continued until the scene was declared safe for traffic. National Highways reported congestion stretching about four miles, with delays reaching up to an hour during the evening, while a diversion was put in place at Junction 11 near Pease Pottage.
Strategic route with limited alternatives
This section of the A23 acts as both a regional road and a strategic link between the M23 motorway and the Sussex coast. Closure of this route caused traffic to build behind the incident and affected nearby roads due to diverted vehicles.
The northbound carriageway remained open throughout the incident. Drivers attempting to pass closures risk safety and cause further disruption, as recent data on roadwork incursions in England show.
Why fire closures take time to clear
Vehicle fires require a full operational response beyond fire suppression. Heat damage can make the road surface unsafe for traffic. Debris can scatter beyond the immediate fire area. Recovery teams cannot begin clearing until the site is confirmed safe by fire services and highway officials.
This incident took about an hour to put out but a further eleven hours to clear and reopen the route. It illustrates how a single burning vehicle can close a busy strategic road overnight.
Fragility of strategic networks under incident pressure
The incident demonstrates the vulnerability of major roads when a serious event occurs. Multiple lanes and shoulders can become impossible to use, narrowing the network suddenly.
Traffic management becomes about control, safety and thorough clearance rather than restoring flow quickly. The priority is ensuring the carriageway is fully safe before reopening.
