A campaign to reduce deaths and injuries from road accidents involving tractors and other slow farm machinery is aiming to go nationwide.
Tractors sometimes need to take to the roads
The Tractor Factor was launched in Perthshire in the summer and the Scottish Executive is now being urged to adopt the scheme.
The warnings emphasise the danger to drivers who fail to realise how slowly the vehicles can be travelling.
It was developed by Perth and Kinross Council's community safety committee.
Convener Alistair Barr said: "Farm vehicles are large, slow moving and often less manoeuvrable than other vehicles and motorists' lack of appreciation of these features can lead to horrific accidents, especially as farm traffic attempts to turn on to a fast section of road.
"There are also issues of motorists driving too quickly on quieter back roads where farm traffic is more likely to be encountered and where visibility or line of sight can be severely reduced by hedgerows, trees and buildings."
A leaflet has been produced which includes a code of practice set out by agricultural group the Perthshire Machinery Ring.
A recent study found that 74% of drivers of agricultural vehicles blamed the drivers of normal vehicles for accidents and that 98% felt that other road users did not appreciate the problems of driving agricultural vehicles or the need for them to use public roads.
Cllr Barr said a few simple precautions could reduce the accident rate and save lives.
He has called on the executive to consider using the scheme across Scotland.