If you hit the city during non-rush hour then I-95 should be okay (just a little tricky at the I-10 interchange). During rush-hour, instead of 9-A you may want to consider I-295. It goes west of the city and is about 35 miles long. 9-A goes east of the city and is mostly highway, but they are still building the last interchange, so there is a stop light, and traffic backs up there because of the existing on-ramps to another expressway. I am not sure how long 9-A is it probably is shorter than i-295, hmm I think I have a new project.
Once that last interchange is done 9-A will be renamed to i-295 as both current sections make a complete loop around the city.