SR-17 (AL)
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| Route information | ||||
| Maintained by ALDOT | ||||
| Length: | 346.562 mi (557.737 km) | |||
| Major junctions | ||||
| South end: |
   US 45 / US 98 / SR 42 in Mobile
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 I‑65 at Mobile  I‑20 / I‑59 in York  US 82 / SR 6 in Reform I‑22 in Hamilton  US 72 / SR 2 in Florence
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| North end: |
 SR 13 at Tennessee state line north of Zip City
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| Location | ||||
| Counties: | Mobile, Washington, Choctaw, Sumter, Pickens, Lamar, Marion, Franklin, Colbert, Lauderdale | |||
| Highway system | ||||
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State Route 17 (SR-17) is a 346.562-mile-long (557.737 km) state highway that travels the length of the state. Between Mobile and Deer Park in Washington County, SR 17 is the unsigned partner route assigned to U.S. Route 45 (US 45), and from Hamilton to Florence, it serves as the signed partner route assigned to US 43.
The southern terminus of US 45 and SR 17 is at their intersection with US 98 and unsigned SR 42 in Mobile. US 45 and SR 17 assume a northwestward trajectory as they leave Mobile heading towards the Mississippi state line. Approximately 5 miles (8.0 km) north of an interchange with Interstate 65 (I-65) northwest of downtown Mobile, the routes quickly enter rural areas of Mobile County via a two-lane highway. Near the small community of Deer Park in southern Washington County, SR 17 diverts from US 45 and becomes a signed route.
After the split from US 45, SR 17 assumes a general northerly orientation as it passes through rural areas and small towns in western Alabama. The route passes through the Black Belt, historically one of the poorer areas of the state. After leaving Mobile, the route does not pass through any towns whose population exceeds 5,000 until it approaches Hamilton in Marion County. At Hamilton, SR 17 once again becomes an unsigned route upon the second junction it has with US 43; US 45 and SR 17 are the southern terminus of US 43 in Mobile.
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