In 1998, the Progressive Insurance company started a pilot program in Texas, in which drivers received a discount for installing a GPS-based device that tracked their driving behavior and reported the results via cellular phone to the company. The program was discontinued in 2000. In following years many policies (including Progressive) have been trialed and successfully introduced worldwide into what are referred to as Telematic Insurance. Such 'telematic' policies typically are based on black-box insurance technology, such devices derive from a stolen vehicle and fleet tracking but are used for insurance purposes. Since 2010 GPS-based and Telematic Insurance systems have become more mainstream in the auto insurance market not just aimed at specialised auto-fleet markets or high value vehicles (with an emphasis on stolen vehicle recovery). Modern GPS-based systems are branded as 'PAYD' Pay As You Drive insurance policies, 'PHYD' Pay How You Drive or since 2012 Smartphone auto insurance policies which utilise smartphones as a GPS sensor, e.g. . A detailed survey of the smartphone as measurement probe for insurance telematics is provided in 
While most of us are eager in availing no-claim bonuses (a discount in premium at renewal if no claim is made during the policy term), but we hardly pay attention towards other smaller discounts which can add up to a substantial amount. All comprehensive insurance plans offer reward for good claim history, with a discount which could be 50% of the premium.
An excess payment, also known as a deductible, is a fixed contribution that must be paid each time a car is repaired with the charges billed to an automotive insurance policy. Normally this payment is made directly to the accident repair "garage" (the term "garage" refers to an establishment where vehicles are serviced and repaired) when the owner collects the car. If one's car is declared to be a "write off" (or "totaled"), then the insurance company will deduct the excess agreed on the policy from the settlement payment it makes to the owner.
NCB is provided to the policyholder and not to the insured automobile. At the time of the vehicle transfer, the insurance plan could be transferred to a new owner but NCB can’t be transferred. The responsibility of paying the remaining balance falls on the shoulders of the new buyer. The original/former owner of the vehicle can use the NCB at the time of purchase of a new automobile.
But liability coverage levels come in threes — you’ll probably see something like 50/100/50 up to 250/500/250 in typical policies. You can think of these limits like: individual injuries / total injuries / property damage. Insurers are a little more technical, calling them bodily injury liability, total bodily injury liability and physical damage liability.