I-175

I-175
State	FL
Route	I-175
Length mi	1.3
Established	1979
Direction a	West
Terminus a	St. Petersburg
Direction b	East
Terminus b	US 19 Alternate
Counties	Pinellas County

I-175 is an Interstate Highway spur in Florida, serving central St. Petersburg on the Pinellas County peninsula. The route provides a short controlled-access connection between downtown St. Petersburg and the broader Interstate network via I-275, linking major corridors such as US 19 Alternate and regional arteries that serve Tampa, Clearwater, and St. Pete Beach. As an urban spur, it supports access to civic landmarks and waterfront districts including Vinoy Park, Sunken Gardens, and the Dale Mabry Highway commercial corridor.

Route description

I-175 begins at a trumpet-style interchange with I-275 near the northern edge of downtown St. Petersburg and proceeds eastward as an elevated dual carriageway paralleling local arterials such as 4th Street North and 9th Street North. The spur passes adjacent to cultural anchors including Amalie Arena, Mahaffey Theater, and the Dali Museum waterfront vicinity before terminating at an interchange with US 19 Alternate and city streets that serve Tyrone Square Mall and the St. Petersburg Pier area. The corridor crosses municipal neighborhoods including Kenwood and Old Northeast while providing ramps that integrate with local streets near 3rd Avenue North and 5th Avenue North.

History

Planning for the spur originated in corridor studies that connected the Howard Frankland Bridge approaches and the Suncoast Parkway corridor with downtown St. Petersburg as part of broader 1950s–1970s regional transportation planning involving Florida Department of Transportation and federal Interstate program priorities under the Federal-Aid Highway Act of 1956. Construction was completed in the late 1970s, with opening phases coinciding with downtown redevelopment projects that included investments near Bayboro Harbor and the Vinoy Renaissance Hotel rehabilitation. Throughout the 1980s and 1990s, municipal initiatives tied to The St. Petersburg Museum of History and waterfront park planning influenced interchange aesthetics and pedestrian access. Periodic resurfacing and safety upgrades were implemented in coordination with state initiatives such as those managed by the Florida Department of Transportation and regional planning entities including the Tampa Bay Area Regional Transportation Authority.

Exit list

The short length yields a compact exit list serving downtown ramps and cross-streets: - Western terminus: interchange with I-275 providing movements toward Tampa and St. Petersburg central loop. - Mid-spur ramps: connectors to 3rd Avenue North, 4th Street North, and access to Mahaffey Theater and Vinoy Park. - Eastern terminus: interchange with US 19 Alternate and city grid arteries serving Gulfport and St. Pete Beach corridors.

Future developments

Proposed projects have focused on multimodal integration, including improved pedestrian and bicycle crossings linking Downtown St. Petersburg attractions such as the Dali Museum and Florida Orchestra venues, coordinated through regional plans involving the Metropolitan Planning Organization and Florida Department of Transportation. Potential resurfacing, noise mitigation, and stormwater upgrades are considered under climate resilience programs referencing initiatives similar to those in Miami-Dade County and Broward County. Studies have also examined converting portions of adjacent airspace and ramps for enhanced transit services aligned with corridors serving Tampa International Airport connections and commuter routes to Clearwater–St. Petersburg International Airport.

Traffic and safety

Traffic volumes concentrate during festival seasons tied to events at Mabe's Sports Complex and waterfront festivals coordinated with St. Petersburg Saturday Morning Market and cruise operations at regional ports such as Port Tampa Bay. Crash mitigation efforts have applied techniques from state programs that also operate along I-4 and I-75, including ramp metering evaluations and signage improvements. Emergency response coordination involves entities like the Pinellas County Sheriff's Office and St. Petersburg Fire Rescue for incidents affecting access to landmarks including Tropicana Field and the Museum of Fine Arts, St. Petersburg.

Auxiliary and related routes

I-175 functions as part of a downtown spur pair with the nearby I-375; both link to I-275 and serve complementary sectors of St. Petersburg's waterfront and commercial districts. Related regional corridors include US 92, SR 60, and US 19, which together form multimodal networks connecting to destinations such as Downtown Tampa and the Suncoast Trail. Coordination among transit providers such as Pinellas Suncoast Transit Authority supports feeder services to the spur.

Cultural and economic impact

The spur has influenced downtown revitalization efforts that involve properties like the Vinoy Renaissance Hotel, The Coliseum, and development around Bayboro Harbor. Improved access has supported hospitality and arts institutions including the Florida Holocaust Museum, Chihuly Collection, and performance venues that draw visitors from Sarasota and Bradenton. Economic activity around retail centers such as Tyrone Square Mall and waterfront dining districts has correlated with the spur’s connectivity, shaping urban redevelopment programs coordinated with entities like the St. Petersburg Downtown Partnership and Pinellas County Economic Development initiatives.

Category:Interstate Highways in Florida