For the record, the Sunshine Skyway is a part of the route of U.S. 19; while the bridge was in its temporary two-lane configuration in the 1980s, Interstate 275 was finally extended to both ends of the bridge, but it wasn't until the new bridge opened that the I-275 route officially joined U.S. 19 on the bridge.
Many of the deaths from the collapse were not the result of vehicles being on the part of the bridge that fell; rather, drivers drove off into empty space in the low visibility conditions. The new bridge has wires attached to the sides of the deck that, if broken, will activate "STOP HERE ON RED" signals located at standard intervals all the way across. There are also plenty of security cameras being monitored remotely as a backup.
The Sunshine Skyway is a toll bridge, with the toll plaza spanning the entire roadway located just south of the bridge. The toll is a mere $1 each way for passenger cars.
A rest area located south of the toll plaza serves traffic in both directions, which allows for reversing course. Therefore, it's easy to make a fairly short scenic drive over the Skyway and back when coming from Tampa or St. Petersburg. It's a fun activity for guests from out of town, and it's even more fun to tell them what happened to the old bridge while sitting in the parking lot at the rest area after already having made the drive in one direction. Well worth the $2 total.