Health and Safety Two

Once again I need to take health and safety into consideration before I film at my second location.
This time I am filming inside a car on a driveway. 
As it is a driveway I need to keep an eye out for other cars that may drive onto the same drive or drive past and create noise. 
I'm filming at night so I need to ensure that my talent is careful when making their way to and from the car so they don't get hurt.
I also need to be careful as my camera won't be positioned on a tripod, it will be placed on the car's dashboard. Therefore I need to make sure it is secure so that it doesn't fall off the dashboard and break or hurt one of my talent.