|South Bay Drive|
I-175 highlighted in red
|Auxiliary route of I-75|
|Maintained by FDOT|
|Length||1.285 mi (2.068 km)|
|West end||I-275 in St. Petersburg|
|East end||SR 594 / SR 687 in St. Petersburg|
Interstate 175 (I-175) in St. Petersburg, Florida, also known as South Bay Drive, is a 1.3-mile-long spur route from Interstate 275 into downtown St. Petersburg. It is also designated as the unsigned highway State Road 594. There is a sibling segment of freeway nearby designated as I-375.
The interstate begins at I-275 with Tropicana Field on the northeast side of the interchange, going east into downtown St. Petersburg, passing through eastbound exits with 9th Street South/8th Street South and 6th Street South before the interstate ends at 5th Avenue South next to an at-grade intersection with 4th Street South. Westbound, the interstate begins with a split from southbound 4th Street South just north of the 4th Street South/5th Avenue South intersection, and has no exits until the interchange with I-275. Along with its sister highway I-375, I-175 lacks exit numbers.
The freeway was originally to have been a part of the former Pinellas Belt Expressway, which would have continued from its western terminus at I-275. The Pinellas Belt Expressway was budgeted in 1974 but was cancelled in the late 1970s due to local opposition. I-175 was built between 1977 and 1980 and opened on April 23, 1980 at a cost of $5.5 million (equivalent to $14.4 million in 2018).
When I-75 was relocated in the late 1970s/early 1980s, five miles (8.0 km) of additional interstate became available; thus, the St. Petersburg feeder sections of I-175 and neighboring I-375 were upgraded to interstate status.
|0.000||0.000||I-275 (SR 93) – Bradenton, Tampa||Westbound exit and eastbound entrance; western terminus, I-275 exit 22; tri-stack interchange.|
|0.785||1.263||M.L. King Jr. Street South / 8th Street South||Eastbound exit and westbound entrance; access to Bayfront Health St. Petersburg|
|1.089||1.753||6th Street South||Eastbound exit and westbound entrance|
|1.285||2.068||4th Street South||East end of I-175; SR 594 continues one block (eastbound only)|
|1.372||2.208||SR 687 north (3rd Street South) – Downtown St. Petersburg|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- "Florida Department of Transportation Interchange Report" (PDF). Florida Department of Transportation. September 29, 2017. p. 7. Retrieved January 22, 2019.
- "Florida's Interstate Exit Numbers". Florida Department of Transportation. Retrieved November 18, 2010.
- "Pinellas County Highways". Retrieved October 5, 2014.
- "I-175 at South-East highways". Retrieved October 5, 2014.
- FDOT straight line diagrams Archived March 6, 2014, at the Wayback Machine, accessed March 2014