 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 . 
