Kentucky Truck Bans & Hazmat Routes

Where Kentucky keeps trucks out

Kentucky's own 'parkways' (Bluegrass, Western Kentucky, the rest) are toll-free highways open to trucks, not cars-only roads. The trap is hazmat. Since 2013 the state bans all hazmat on I-75 north of I-275, including the Brent Spence Bridge into Cincinnati; that ban sat barely signed for years, and placarded loads now detour on I-275. The Cumberland Gap Tunnel (US-25E) bars Class 1 explosives. Watch Louisville's 3rd Street 'can opener' overpass (603 KAR 5:077).

Key restrictions

• Brent Spence Bridge (I-75/71 to Cincinnati): all hazmat banned north of I-275 since 2013; detour on I-275.
• Cumberland Gap Tunnel (US-25E, KY/TN line): no Class 1 explosives; other hazmat and oversize escorted; 16.5 ft clearance.
• Louisville 3rd Street 'can opener' overpass: chronic box-truck strikes, obey the posted clearance.
• KY 'parkways' (Bluegrass, Western Kentucky, etc.) are truck-legal, not cars-only.

• Parkway / road ban: No cars-only parkways. Kentucky's named 'parkways' (Bluegrass, Western Kentucky, and the rest) are toll-free highways open to trucks, not cars-only roads like NY or CT.
• Hazmat: Since 2013 Kentucky bans all hazmat on I-75 north of I-275, including the double-decked Brent Spence Bridge into Cincinnati, and routes placarded loads onto I-275 around the metro; the ban sat barely signed for years before new signs went up. The Cumberland Gap Tunnel on US-25E (KY/TN line) bars Class 1 explosives, escorts other hazmat and oversize, and clears 16.5 ft.
• Through-truck routes: Louisville and Lexington post local truck routes and weight-limited streets. Kentucky's named parkways are truck-legal through routes, not cars-only. A through truck with no local stop stays on the designated network; a local stop earns direct access under STAA reasonable access.
• Fine: A hazmat routing violation is a misdemeanor under state law with a moderate fine; a placarded load on the Brent Spence Bridge or off a designated route also risks FMCSA/PHMSA civil penalties running into the thousands. Hit the 3rd Street 'can opener' and you pay for the damage.

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