Louisiana Highway 415
||This article may require cleanup to meet Wikipedia's quality standards. (October 2011)|
|Maintained by Louisiana DOTD|
|Length:||24.1 mi (38.8 km)|
|Existed:||1955 renumbering – present|
|South end:||LA 76 in West Baton Rouge Parish|
|US 190 in Lobdell|
|North end:||LA 413 in Pointe Coupee Parish|
Route description 
LA 415 begins at an intersection with LA 76 in West Baton Rouge Parish, and heads due north approximately 4.3 miles towards Erwinville. This stretch of LA 413 is locally known as Poydras Bayou Road. In Erwinville, LA 413 intersects US 190 near milepost 4.3. It then proceeds north approximately 0.4 miles to an intersection with LA 620 near milepost 4.7. The highway at this point is locally referred to still as Poydras Bayou Road, but also as "Snake Road" due to its sharp curves that follow Bayou Poydras. It continues north approximately 1.8 miles and crosses into Pointe Coupee Parish near the intersection of LA 3091, at milepost 6.7.
LA 413 continues north into Pointe Coupee to an intersection with LA 416. It turns left and proceeds west, where it shares LA 416's roadbed for approximately 0.1 miles, then turns right, (known locally as Zach Road at this point) proceeding north to an intersection with LA 414. LA 413 turns left and proceeds west through Jarreau, Louisiana, then north through Dupont, Louisiana, and then east to another intersection with LA 414 in Ventress, LA. LA 413 then turns right and proceeds to an intersection with LA 415 in Ventress. The highway then turns left and proceeds west until it ends at milepost 23.6, inside the city limits of New Roads, LA.
55 mph beginning of highway at LA 76 to Erwinville
45 mph south side of Erwinville to north side of US 190 intersection
35 mph north side of US 190 intersection to LA 620
45 mph north side of LA 620 to end of the highway in New Roads
Spur route 
|Length:||0.46 mi (0.74 km)|
Starting at an intersection with LA 415 and LA 987-3, LA 415 Spur serves the purpose of moving traffic from US 190 onto LA 415 south towards I-10 and Baton Rouge. It is signed southbound as South Spur LA 415, but is signed northbound only as Alternate Route I-10.
|0.00||0.00||LA 987-3 / LA 415 to US 190 east / LA 1 south||Southern terminus|
|0.4||0.6||US 190 west (Airline Highway) / LA 1 north||Northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|