The transmission system in your vehicle allows you to change gears. Lower gears are power gears. They get your vehicle moving and get it up hills. Higher gears get the vehicle up to speed and get it rolling faster. If you have a standard transmission, then you have to do the work of shifting gears yourself.
There have been great strides in headlight technology in recent years and DC car owners are safer at night because of it. Good headlights improve visibility and peripheral vision, enabling you to see farther and wider. The more you can see, the quicker you can react to road conditions. This is essential because nearly half of traffic fatalities take place at night.
Part of the engineering that goes into designing a vehicle is testing the components to ensure that they meet durability and safety standards. Because of this, manufacturers have a good idea as to how long the parts in your vehicle will last under normal driving conditions. They give us guidelines to follow regarding inspection and maintenance schedules for our late model vehicles.