I'd like to see a study of the affects on traffic if the expressway portion was removed between downtown and MLK Pkwy. Forcing all of that through traffic up and around on MLK Parkway.
It would be easy to test with the traffic models the North Florida TPO and JTA have - just remove the links between Liberty Street and APRandolph Street.
If this were done, State and Union could be right-sized, and perhaps made 2-way (although the State Street access to I-95 South would have to be reconfigured). [This would require a little more intensive model work, to recode each of the links of State and Union west of Liberty Street.]
Some semi-educated guesses:
For traffic between I-95 and Arlington:
1. Some, perhaps the majority, will use MLK - I would improve the I-95/MLK interchange to facilitate this
2. Some, perhaps the 2nd biggest share, if not the biggest, would use the new I-95 interchange at Atlantic Boulevard
3. Traffic would disperse among the east-west streets between APR and I-95.
For traffic between Downtown and Arlington - the above, without the MLK option, as it doesn't really serve downtown
4. Traffic would also use the remaining downtown bridges (Hart, Main St., and Acosta) to connect to Atlantic Blvd.
Major events in the Sports and Entertainment District - it will take longer to clear after events
5. Everyone would use the U2C! - no, wait, that's not right
6. All of the above (except the JTA employees who will be required to use the U2C)