Interstate 175 Florida
Interstate 175 (South Bay Drive) constitutes the southern freeway spur connecting I-275 with Tropicana Field and Downtown St. Petersburg. The second shortest Interstate in Florida, I-175 is only one-tenth of a mile longer than nearby Interstate 375 (North Bay Drive). The freeway doubles as Florida State Road 594, which extends one block east of the freeway end to SR 687 (3rd Street South) north.
When Interstate 75 was relocated to the east Tampa bypass in Hillsborough County in the late 1970s, five miles of eligible Interstate mileage became available for use elsewhere in Florida. Some of this unused mileage was allocated for the South Bay Drive spur to Downtown St. Petersburg (Interstate 175).
South Bay Drive was constructed in tandem with North Bay Drive (I-375) in two phases between 1977 and 1980. Work on the final link for the freeway, between 9th Street South (Martin Luther King Jr. Street) and 4th Street South, commenced in 1977.1 Interstate 175 fully opened to traffic by April 23, 1980 at a cost of $5.5-million. However it was not officially included in the Interstate System until November 1982.2
West End – St. Petersburg, FL
East End – St. Petersburg, FL
- Mileage – 1.44
- Cities – St. Petersburg
- Junctions –
Source: December 31, 2017 Interstate Route Log and Finders List
I-275 Annual Average Daily Traffic (AADT)
|Vehicles per day||Location|
|34,500||I-275 to MLK St S|
|22,400||MLK St S to 6th St S|
|12,600||6th St s to 4th St S|
Source: Florida Traffic Information 2013 (web site)
East End – St. Petersburg, Florida
West End – St. Petersburg, Florida
- “I-275 south feeder is open downtown.” St. Petersburg Times, July 24, 1980.
- American Association of State Highway and Transportation Officials (AASHTO) Route Numbering Committee Meeting, November 19, 1982 (document).
Page updated August 21, 2014.