Are there any speed bumps at Calais or near the run up to Calais?
Thanks !
Is this by any chance related to immigrants? Perhaps the theory being if you hit them at 56 you’ll clear the axles off? 
There are speed humps at Calais docks as you drop off the dual carriageway down the ramp and around the 180’ bend towards the first security check.
And there are speed humps on the truck only access road into the tunnel terminal once you see the first driver information sign.
None that I know of further out from Calais.
Not really speed bumps are they? Raised painted strips I would call them.