Jase2985:
solid white lines dont mean you cant change lanes, it just means you need to be more cautious when you do. its not illegal to do it, so you cant be fined for it unless its unsafe.
all they want it people to stay in their lanes so there is less of a chance of an accident caused by someone changing lanes.
Pretty sure drivers are generally expected to comply with road signage though, and the tunnel has big "No Lane Changing" signs at both ends as in the pic above.


