The concept is similar to pay as you drive and it takes into the account the distance you travel as one of the items on your policy. Through self-reported mileage reports you send in form time to time, the insurance firm establishes the relationship between your insurance premiums and the distance traveled making for affordable and adequate insurance coverage. Trending is established after a few months and with higher mileage comes a well oiled vehicle, meaning it is well maintained enough to get you lower premiums. Pay as you drive differs little, adding the factor of how much travel time and how well you use your car, based on your needs choosing public transport over the car for short trips and using well planned routes for long trips, all making for one lean machine and a mean insurance coverage to match.