HI, I print a list of the bridge / causeway times and leave in the rental car. List is accurate for last yr have not checked if the same for this winter.
The times are useful if out and about and trying to avoid traffic. The causeway also lets you circle the lagoon on the Cole Bay side to avoid the bridge in Simpson Bay

J&B

Bridge Opening Times
Bridge Causeway
07:30 - on call
08:30 - everyday 08:15 - everyday
09:30 - everyday 09:45 - everyday
10:30 - everyday 10:15 - everyday
11:30 - everyday 11:45 - everyday
15:00 - everyday 15:15 - on call
16:00 - everyday 15:45 - everyday
17:00 - everyday 17:15 - everyday

French Side
09:00 - everyday 8:15 - to change to 9:00
14:30 - Monday - Saturday (excluding holidays)
17:30 - everyday