In Indiana, where my theatre is, it is state law to have a fire lane in front of a theatre.
When I bought my theatre in 1996, it had been closed for three years and the city had taken back the fire lane for parking.
I quickly got the fire marshall to order the city to put it back.
So if you had your fire lane and no parking spaces there, it should be enough space to move the sidewalk out just in front of the marquee out to where you can't drive into it.
You would probably have to pay for the new sidewalk and curb, but it beats a mangled marquee.