Seat belt
The seat belt should fit closely against the shoulder, with the diagonal section between the breasts and to the side of the stomach.
The lap section of the seat belt should lie flat over the thighs and as far as possible under the stomach. Never let it ride upward. Remove unnecessary slack and make sure the seat belt fits as close as possible to the body. Make sure there are no twists in the seat belt.
Seating position
As pregnancy progresses, pregnant drivers should adjust the seat and steering wheel to a position that allows them to retain full control of the vehicle (which means they should be able to easily reach the steering wheel and foot pedals). Try to maintain as much distance as possible between the stomach and the steering wheel.