An uneven road surface
a bumpy road
air
if you are talking about the pressure Gauge it is becouse your car is bumpy or you drive too fast
Presence of ribosomes on the membrane of endoplasmic reticulum makes the surface look bumpy.
idiots we need the answer
All car DVD Players do not have the amazing stabilization feature for bumpy roads.
It'll definitely be a little bumpy driving without them.
Deflate your tires a bit. Drive slower as normal, be extra focused, avoid bumpy roads, buy a four wheel drive car or a car with soft suspension, turn on your headlights
it makes the road bumpy
So you don't get brain damage when you drive on bumpy roads.
Poor or rotten roads make rough riding while thin layered tires add more to it as well.
The bumpier the road, the more resistance the car has to move forward.