A GANG of drunken teenagers "ambushed" cars as they passed through East Riding villages, spitting at motorists and hurling beer cans.
Some of the louts were spotted laying in the road to bring traffic to a standstill, before others threatened terrified drivers.
One witness, who did not wish to be named for fear of recriminations, attempted to follow the gang.
He said: "They were ambushing traffic and it was really getting pretty tasty.
"I spotted a group of them, probably aged about 18, at about 9.10am drinking, some with their tops off, in Hedon.
"When I was driving back after visiting my doctor's surgery, I saw two of them laying down in the road to make traffic stop. They were drunk.
"The others then shouted abuse at the drivers and acted in an extremely threatening manner."
Fearing a car colliding with one of the men, the retired engineer followed the group from a safe distance as they passed through Preston and Bilton.
"They were throwing cans of beer at the vehicles and even spitting through open windows when the cars stopped," he said.
"I decided to follow them because if someone was going to hit them in their car, I wanted them to have a witness.
"After a while, they noticed I was following them and I was forced to drive past them.
"A couple of them dropped to the ground, but I managed to weave around them and get away from them.
"As I passed the group, one of them went to kick my car but he missed and fell to the ground.
"I would estimate that within the 40 minutes or so all this was going on, a good 150 to 200 people were affected by this mindless group of idiots."
The motorist said police were called, but the officer was forced to back away when confronted by the group.
A Humberside Police spokesman said: "We received a call at 9.37am on Friday, August 2, reporting a group of youths causing alarm and disruption to traffic and road users in the Preston area of East Yorkshire.
"A further call was received shortly afterwards, reporting similar behaviour from what appeared to be the same youths on the stretch of road approaching the Sandhill Nursery.
"Police were able to attend and speak to the youths on the basis of reports received, which warranted words of advice.
"Subsequent reports that were made following the original call, which details incidents of a more serious nature, including an allegation of indecent exposure, are now being followed up.
"Police would like to speak to those people who called in anonymously in order to further their enquiries.
"The identity of one of the group has been confirmed and police are additionally appealing for anyone who may be able to assist in identifying other members of the group to come forward."
Anyone with information is asked to call police on 101, quoting log number 223.
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