A stolen van was driven the wrong way down a motorway for nearly 50 miles, police have said.
Police say up to 100 vehicles, including HGVs, were forced to dodge the van as it was driven from Essex into Cambridgeshire.
Detectives have appealed for witnesses after the vehicle was stolen in Billericay and driven against the flow of traffic on the M11 and A14 to escape a police pursuit.
Officers were called at about 1.40am today after the white Transit van was taken from an address in the town's Stock Road.
An Essex Police spokesman said: "A widespread search was carried out by police and the vehicle was seen near Ongar where officers tried to stop it.
"The van continued along the A414 to Hastingwood where it joined the M11, driving north on the southbound carriageway.
"Essex police vehicles monitored the van from the northbound carriageway while a police helicopter flew overhead."
The van stopped after crashing into an HGV near Junction 24 of the A14 at Godmanchester.
A 19-year-old man from Romford was arrested on suspicion of aggravated taking a vehicle without consent, dangerous driving, no insurance, no licence and failing to stop for police. He is currently in custody.
Witnesses or drivers who were forced to take evasive action on the A414, M11 and A14 should contact detectives at Basildon CID on 101.