As the Swedish airforce uses motorways as tactical airstrips and the bridges at hand as hangars, they realized that rising every bridge to accommodate the hight of their fighters was too much, and the SAAB factory took their counter measures around the tailfins on the SAAB Viggen:
On the other hand: It seems like they have been prepared for the tilting trick with the SAAB Draken and fixed a rollerskate under the tail:
;-)