Delaware Route 9A
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| Route information | ||||
| Maintained by DelDOT | ||||
| Length: | 0.78 mi (1.26 km) Official length, signed length is 2.0 miles (3.2 km). |
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| Existed: | 1971 – present | |||
| Major junctions | ||||
| South end: |
 DE 9 in Wilmington
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 I‑495 near Port of Wilmington
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| North end: |
 US 13 / DE 9 in Wilmington |
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| Location | ||||
| Counties: | New Castle | |||
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Delaware Route 9A (DE 9A) is a two- to four-lane road in Wilmington, Delaware that serves as the primary access route to the Port of Wilmington as well as provide access to Interstate 495 (I-495). The official designation of the route runs 0.78 miles (1.26 km) along Terminal Avenue between DE 9 and the Port of Wilmington, interchanging with I-495. Signage has the route continuing north along Christiana Avenue to an intersection with U.S. Route 13 (US 13) and DE 9 for a total length of 2.0 mi (3.2 km). Christiana Avenue originally became a state highway in the 1920s, becoming a part of US 40 that connected to a ferry across the Delaware River to Penns Grove, New Jersey. US 40 was removed from this road in the 1930s and it later became part of DE 48, which was subsequently removed in the 1950s following the discontinuance of the ferry. DE 9A was designated by 1971.
DE 9A begins at an intersection with DE 9 in Wilmington, heading east-southeast as two-lane undivided Terminal Avenue through residential areas. The road widens into a four-lane divided highway and comes to an interchange with I-495. Past I-495, the road heads through industrial areas, becoming an undivided road as it crosses over Norfolk Southern's New Castle Secondary railroad line at a grade crossing. The road crosses another railroad branch before reaching the entrance to the Port of Wilmington at the Christiana Avenue intersection. At this point, DelDOT officially marks the end of DE 9A, but signage shows it turning north onto Christiana Avenue.
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