Take the A26 from Calais to Reims
At Reims take the A4 to Strasbourg
At Strasbourg head onto the A35 which will take you across the
city
There's a temporary gap in the A35 south of Strasbourg. Follow
the signs to Colmar and you'll arrive back on the A35, and head
towards Mulhouse
After you pass Mulhouse you'll cross the border into
Switzerland, and arrive in Basel
Take the A3 towads Zurich. On the way, you'll join the A1.
The journey takes about 7.5 hours.