POLICE are advising motorists to only travel if necessary following 12 crashes since midnight.

Further snowfall is expected today with conditions set to deteriorate.

Essex police officers are asking motorists if they do intend to make a journey to carry out the following preparations before setting off:

- Make sure all your car lights are working and you have no failed bulbs. Ensure that dirt, salt and snow is cleared away from light fixtures.

- Always ensure all windows are fully cleared of snow, frost and condensation before setting off on a journey - it is illegal to drive with obscured vision.

- Also clear snow from the top of the car as this can fall down and obscure your windscreen while you are driving.

- Keep windscreen washer fluid topped up as windscreens quickly become dirty from traffic spray and salt from the roads.

- Make sure you have sufficient fuel for your journey. Keep the fuel tank topped up.