Driving from CDG to Amboise
 

I have looked up the driving directions on ViaMichelin. There is a long stretch on the A10 where Michelin has multiple yellow warning signs stating that it is a dangerous road. What exactly does that mean? This is a major toll road so I am not sure what could be so dangerous. I'm confused. Any ideas?

You wil be driving around Paris on the périphérique which is dangerous in the sense of very heavy traffic, stop and start, lower speeds to observe. The traffic may be very heavy most of the way and likely around Orléans. We've driven that route a few times, it always takes us much longer than what is posted.

If the "warning signs" you are talking about are a yellow triangle with an exclamation point inside this indicates sections of the road where there is road work. It has nothing to do with indicating a dangerous section of road. On the viamichelin site the is a legend with icons just above the map and if you hover your mouse over the icons it will tell you what these icons mean.

ditto, read the legend

Thanks very much