Rouen Bridge Alternative Routes

Hello all,

Im travelling through from Calais through Rouen towards La Rochelle on the 5th of July (Saturday).

Obvioulsy there has been the Rouen Bridge fire which means the main bridge is out of service till August.

Could anyone explain to me in Lehman terms how i should go about re-routing as everything that I read about it just makes it seem more complicated than it actually is!

Cheers!