From the Hertz France rental agreement:
What about parking fines, road tolls and other traffic related charges?
You are responsible for payment of all fines, road tolls and similar charges incurred in relation to the vehicle during your rental.
Some of these charges and fines will be sent to us for payment, which we will pay and recover from you. Alternatively, we may be required to provide your details to the relevant authority, who will contact you directly. Either way, we will recover the costs we incur through an administration charge. Please ask at the rental location if you want to see our current charges.
See also:
http://www.flyertalk.com/forum/hertz...ice-twice.html
http://www.flyertalk.com/forum/hertz...ts-madrid.html
http://www.flyertalk.com/forum/hertz...lations-6.html
http://www.flyertalk.com/forum/hertz...-ticket-3.html