They don't have many cats' eyes in France, but they do have a varied range of traffic calming features, some of which can be quite hazardous. These include well disguised traffic islands, raised sections of the central white line, bits of pavé set into the road, ramps and many different types of bollard.
While queuing at the start, I was chatting to an English rider who had ridden down, and he showed me his grazes from coming off on a piece of traffic calming. He is in good company as they claim the odd rider in the Tour.
But don't let that put you off, Stu. At 43, you will be younger than both me and (hard to believe as this may be) Els are now, and well below the average age!