The Act gives the police an additional tool to deal with those who cause alarm, distress or annoyance to members of the public through the antisocial use of vehicles on public roads or off-road.
The police can stop and seize or remove motor vehicles which are being driven on or off-road:
Where the vehicle is being or has been driven without due care and
attention, or reasonable consideration for other road users; and
Where the vehicle is being driven in a manner which is causing, or is likely to cause, alarm distress or annoyanace.
A constable must have reasonable grounds for believing the above is happening.
Please scroll down for more info on the seizure of vehicles.
Seizure of vehicles is covered in Part 10 of the Act:
Read the Antisocial Behaviour Act
Statutory Guidance on the Seizure of Vehicles (PDF, 1.93Mb)
Regulations governing the power to seize vehicles came into effect
on 17 March 2005. You can read the regulations in full on the HMSO
website:
The Police (Retention and Disposal of Motor Vehicles) (Scotland) Regulations 2005
You'll find answers to your questions about Seizure of Vehicles on the FAQs page.

"People face a real risk of their vehicle being seized if they
persist in careless or inconsiderate driving and ignore police warnings
to stop behaving in a manner that distresses others. This measure
in the Act provides the police with a real opportunity to address these
problems. We have already issued warning notices in Fife – the first
step in the process to use the power to seize vehicles."
– Superintendent Tony Fitzpatrick, Fife Constabulary