A pilot and escort vehicle service is required for oversize loads and generally, the larger the load, the more escort vehicles are involved. Pilot vehicles are there to warn other road users about the oversize load and heavy haulage vehicles ahead. Fitted with orange flashing lights and the large ‘oversize load ahead’ sign on the roof of the vehicle, a pilot and escort vehicle is usually positioned in front of the oversize load and heavy haulage vehicles as well as behind. Read full article: http://www.nationalheavyhaulage.com.au/news/72-what-is-a-pilot-or-escort-vehicle-service