My recommendation:
Build the bridge with 4 to 6 lanes going each way. Charge a $1 each way or $2 toll to go into the City. Restrict the trucking traffic to the right two lanes.
Create two HOV lanes each way that allow the following at no charge:
buses
emergency vehicles
tow trucks
motorcycles
Vehicles with more than one person
Allow the use of transponder tolls for vehicles that are willing to pay $5 to use the HOV lanes with only one person. Establish a bus line to run over the bridge if there is not already one in existence.
Build the two center HOV lanes with enough structural support to retro fit a light rail should the city decide for that option in the future.
HOV lanes and light rail are both rips.