<Li> Speed limit : 45 miles per hour ( 72 km / h ) for passenger cars , 20 miles per hour ( 32 km / h ) for heavy trucks . Heavy trucks are also required to leave 500 feet ( 150 m ) spacing ahead . </Li>
<Li> Speed limit : 45 miles per hour ( 72 km / h ) for passenger cars , 20 miles per hour ( 32 km / h ) for heavy trucks . Heavy trucks are also required to leave 500 feet ( 150 m ) spacing ahead . </Li>
what is the speed limit on the mackinaw bridge
what is the speed limit on the mackinaw bridge
45 miles per hour ( 72 km / h ) for passenger cars 20 miles per hour ( 32 km / h ) for heavy trucks
45 miles per hour ( 72 km / h ) for passenger cars 20 miles per hour ( 32 km / h ) for heavy trucks