Louisiana Highway 601 (LA 601) runs 1.713 miles (2.8 km) runs in a north–south direction from Eakers Street and Crothers Drive near I-20 and LA 602-1 in Richmond, along Crothers Drive, to and Johnson Street to US 65 (South Cedar Street/South Chestnut Street) in downtown Tallulah. LA 601 also serves as the eastern terminus for LA 3202 (Felicia Avenue).[3][4]
LA 601 first appeared on the official state highway map in 1976, running between US 65 in Tallulah, to LA 602 in Richmond, south of present day I-20 (which was under construction at the time).[5] In 1977, LA 601 was truncated to its current terminus after I-20 was completed, cutting off the southern section of the route.[6] This former section of LA 601 is now known as Eaker Road and is locally maintained.[3]
Louisiana Highway 602 (LA 602) presently consists of two segments of state highways (LA 601-1 and LA 602-2) in Madison Parish that connect I-20 and US 80.[8] The two segments of this road previously connected on a road (known only as LA 602 at the time) south of I-20 paralleling Brushy Bayou and Walnut Bayou.[9] LA 602 first appeared on state highway maps in 1960, utilizing this route.[10] LA 602 ran 13.768 miles (22.2 km) in total length.[7] The middle segment between I-20 exits 173 and 182, which comprised most of the route, was deleted from the state highway system around 2013. The remaining sections between I-20 and US 80 became LA 602-1 and LA 602-2 respectively, effectively retiring the non-hyphenated LA 602 designation.[9][8][11]
Louisiana Highway 602-1 (LA 602-1) (1.913 miles or 3.079 kilometres) runs near Richmond between US 80 and I-20's exit 173. It is a two-lane roadway that runs to the east of Richmond mostly paralleling a canal named Brushy Bayou.[1][12]
LA 605 heads north from St. Joseph following the shoreline of Lake Bruin, an oxbow lake of the Mississippi River. The highway intersects LA 607 and LA 604 as it breaks away from the lake to the northeast. It then intersects LA 608 and turns northwest, continuing the route of that highway along Lake St. Joseph, a second oxbow lake. Passing through the town of Newellton, LA 605 intersects LA 4 and LA 887. Following a turn to the north at Balmoral, the highway ends at an intersection with US 65.[16]
The route serves as a short connector, providing access to Lake Bruin from US 65. LA 607 is located roughly midway between St. Joseph and Newellton. It is an undivided two-lane highway for its entire length.[18][19][20]
Louisiana Highway 613 (LA 613) was a collection of four state-maintained streets in Metairie and New Orleans established with the 1955 Louisiana Highway renumbering. All four routes have since been deleted from the state highway system.
LA 620 heads due east from LA 413, just north of the latter's intersection with the concurrent US 190 and LA 1 in Erwinville. LA 620 intersects three minor state routes (LA 3091, LA 984, and LA 983) before terminating at LA 415 (River Road) in an area known as Smithfield. LA 620 is an undivided two-lane highway for its entire length.
The route heads east from LA 73 (Old Jefferson Highway) adjacent to I-10 Exit 173. It crosses both US 61 (Airline Highway) and LA 44 (North Burnside Avenue) north of Gonzales before ending at LA 431 in an area known as Brignac. LA 621 is an undivided two-lane highway for its entire length.[31][32][33]
The route heads southeast from Yscloskey, running along the north bank of Bayou La Loutre. After passing through Hopedale, LA 624 curves to the northeast with the bayou and proceeds 1.5 miles (2.4 km) to the end of state maintenance. A local road continues a short distance to a dead end at the Mississippi River Gulf Outlet Canal. LA 624 is an undivided two-lane highway for its entire length.[36][37][38]
Louisiana Highway 625 (LA 625) runs 0.25 miles (0.40 km) in an east–west direction along Maple Street in Yscloskey, St. Bernard Parish.[39]
The route begins at LA 46 (Florissant Highway), which runs along Bayou La Loutre. It then curves to the southeast to a dead end at Bayou Yscloskey. It is an undivided, two-lane highway for its entire length.[37][38][39]
Louisiana Highway 626 (LA 626) runs 2.56 miles (4.12 km) in a north–south direction along St. Rose Avenue from LA 48 in St. Rose to US 61 at the northeast corner of Destrehan, St. Charles Parish.[43]
In the pre-1955 state highway system, LA 627 was designated as State Route 682.[46] LA 627 was created in the 1955 Louisiana Highway renumbering,[41] connecting to LA 48 at a slightly different location. In the early 2000s, the southern portion of LA 627 was re-routed from Prospect Avenue onto a parallel road formerly known as Garrison Street.[44][47] The original route is now signed as "Old Prospect."[45]
The route heads southeast along East 5th Street from LA 44 (Main Street) in LaPlace. It approaches and begins to run alongside the east bank levee of the Mississippi River, where it becomes known as River Road. LA 628 intersects LA 636-1 (McReine Road) and LA 3217, two short connectors to the parallel US 61.[48][49][50] The highway then crosses from St. John the Baptist Parish into the St. Charles Parish community of Montz. Reaching the Upper Guide Levee of the Bonnet Carré Spillway, LA 628 turns away from the river and heads northeast on C.C. Road. It parallels the spillway levee to its terminus at US 61 (Airline Highway). LA 628 is an undivided two-lane highway for its entire length.[38][44][48]
Louisiana Highway 630 (LA 630) ran 0.94 miles (1.51 km) in a west–east direction along Courthouse Lane in Hahnville, St. Charles Parish.[52]
The route headed southwest from LA 18 (River Road), which runs along the Mississippi River, made a zigzag around the St. Charles Parish courthouse, and continued to the Texas & Pacific Railroad (now the Union Pacific Railroad) tracks. It was an undivided, two-lane highway for its entire length.[52]
Louisiana Highway 631 (LA 631) runs 9.0 miles (14.5 km) in a southwest to northeast direction from US 90 in Des Allemands to LA 52 in Boutte.
LA 631 follows the original route of US 90 before the parallel four-lane alignment was constructed. It begins in extreme eastern Lafourche Parish and crosses Bayou Des Allemands in the community of Des Allemands. The route then heads northeast through St. Charles Parish through the community of Paradis. Just before reaching its terminus at LA 52 in Boutte, LA 631 crosses underneath I-310. LA 631 is an undivided two lane highway for its entire length.
The route has a spur that travels 0.5 miles (0.80 km) to a junction with US 90 in Des Allemands, providing access from the main highway to the small business district.
The route heads southeast along Levee Road and crosses both LA 631 Spur (Old US 90) and current US 90 in Des Allemands. Now known as WPA Road, LA 632 turns due east into an area known as Bayou Gauche and intersects LA 306 (Bayou Gauche Road). LA 632 turns north and runs concurrently with LA 306 for a short distance before turning east onto Grand Bayou Road, which it follows to a dead end at the Paradis Canal. LA 632 is an undivided two-lane highway for its entire length.[38][44][54]
Louisiana Highway 633 (LA 633) runs 2.78 miles (4.47 km) in a north–south direction along Magnolia Ridge Road from a local road at Grand Bayou to a junction with US 90 and LA 52 in Boutte, St. Charles Parish. It is an undivided two-lane highway for its entire length.[38][44][55]
LA 639 is a short and lightly traveled local road that begins just north of the Union Pacific Railroad track and continues northward to LA 18 (River Road). Its only major feature is the old Johnson (later renamed Carroll) Plantation, in which a few slave cabins and an overseer's house remain. The route has been unsigned in recent years.
LA 640 heads north from LA 3127 near West St. John High School. It intersects LA 18 (River Road) near the St. John the Baptist Parish Courthouse, and had run 0.3 mi west along LA 18 to a ferry road. Until 2013, it crossed the river via the Edgard-Reserve Ferry. LA 640 had ended at the east bank river road (LA 44) at an intersection with LA 53. It is an undivided two-lane highway for its entire length.
Louisiana Highway 641 (LA 641) is a state highway in Louisiana that serves St. James Parish. It travels 6.9 miles (11.1 km) in the shape of a capital J, starting northwest, veering northeast, and then turning north, serving the communities of Lutcher and Gramercy and providing a connection to Interstate 10 (I-10) for those towns.
Louisiana Highway 642 (LA 642) runs 3.75 miles (6.04 km) in a north–south direction from LA 44 at Remy to the end of state maintenance in Grand Point, St. James Parish.[61]
The route heads north from LA 44 at the east bank levee of the Mississippi River and crosses the Canadian National Railway (CN) tracks at grade. 1.3 miles (2.1 km) later, LA 642 intersects LA 3125. It then zigzags to the west and north through an area known as Grand Point. At the end of its route, the highway turns east and becomes a dirt road. State maintenance ends shortly afterward as the road turns again to the north, the local road reaching a boat launch on Blind River.[62] LA 642 is an undivided two-lane highway for its entire length.[33][61][63]
Louisiana Highway 643 (LA 643) runs 2.85 miles (4.59 km) in a general east–west direction from LA 20 to the St. James–St. John the Baptist parish line in an area known as Lower Vacherie. It is an undivided two-lane highway for its entire length.[65][66]
The route once continued further east to a dead end at Lac Des Allemands, but this portion was transferred to local control in 2018 as part of La DOTD's Road Transfer program.[64]
The route heads eastward through Lower Vacherie from LA 20. After 1.3 miles (2.1 km), it turns to the south and ends at an intersection with LA 643, which continues in a general eastward direction to nearby Lac Des Allemands. LA 644 is an undivided two-lane highway for its entire length.[33][63][67]
Louisiana Highway 646 (LA 646) was a state highway that served Lafourche Parish. It spanned a total of 3.3 miles (5.3 km)[70] along French Plantation Road and Little Choupic Road west of Thibodaux, near the Lafourche-Assumption parish line.
Louisiana Highway 647 (LA 647) ran 8.3 miles (13.4 km) in a northwest to southeast direction from LA 20 in Chackbay (shown as Chegby on maps of the time) to Sanchez Road, a local road in an area known as Choctaw.[71]
LA 647 was an undivided two-lane highway for its entire length.
Louisiana Highway 648 (LA 648) runs 2.34 miles (3.77 km) in a southwest to northeast direction from LA 20 south of Thibodaux to LA 308 east of Thibodaux.[73]
LA 648 heads east from LA 20 on Percy Brown Road, crossing from Terrebonne Parish into Lafourche Parish. It immediately turns to the northeast and briefly passes through the southeast corner of Thibodaux. At the end of its route, LA 648 intersects LA 1, crosses a bridge over Bayou Lafourche, and terminates immediately afterward at LA 308, which follows the opposite bank. LA 648 is an undivided two-lane highway for its entire length.
The entire above route appears on current La DOTD maps as LA 648 and is signed accordingly in the field; however, the departmental GIS and LRS systems still show most of the route under its former designation of LA 648 Spur. Prior to the 2000s, LA 648 turned northwest from Percy Brown Road onto Acadia Road in Thibodaux and headed back to a terminus at LA 20, existing as a short loop off of that highway. The remainder of Percy Brown Road running northeast to LA 308 was designated as LA 648 Spur, now absorbed by the main route.
The route is 0.07 miles (0.11 km) long, connecting LA 1 and LA 308 which run along the west and east banks of the bayou, respectively. It is an undivided two-lane highway for its entire length.[38][74][75]
^ abLouisiana Department of Transportation and Development (2012). LADOTD Bing Maps Tool (Map). Retrieved July 13, 2022.
^ abLouisiana Department of Transportation and Development, Office of Multimodal Planning (March 2, 2017). Right-Size the State Highway System: Madison Parish (East Section)(PDF) (Map). Scale not given. Baton Rouge: Louisiana Department of Transportation and Development. Retrieved July 26, 2019.
^ abLouisiana Department of Transportation and Development, Office of Multimodal Planning (February 2012). Madison Parish (East Section)(PDF) (Map). Scale not given. Baton Rouge: Louisiana Department of Transportation and Development. Retrieved July 26, 2019.
^Tensas Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^Ascension Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^ abcSt. Bernard Parish (West Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^St. Bernard Parish (West Section) (Map) (January 1, 1955 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1951.
^ abcdefg"Act No. 40, House Bill No. 311". State-Times. Baton Rouge. June 18, 1955. pp. 3B –7B.
^St. Bernard Parish (West Section) (Map) (January 1, 1958 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1951.
^ abcdefghijklSt. Charles Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^ abcdeSt. Charles Parish (Map) (January 1, 1955 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1951.
^St. Charles Parish (Map). Cartography by DOTD Office of Planning and Programming. Louisiana Department of Transportation and Development. 1999.
^ abSt. John the Baptist Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^ abcdSt. Charles Parish (Map) (January 1, 1958 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1951.
^ abSt. James Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^Louisiana Department of Transportation and Development, Office of Multimodal Planning (March 2, 2017). Right-Size the State Highway System: St. James Parish(PDF) (Map). Scale not given. Baton Rouge: Louisiana Department of Transportation and Development. Retrieved April 15, 2019.
^ abLafourche Parish (Northwest Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 3, 2013.
^Lafourche Parish (North Section) (Map) (January 1, 1955 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1953.
^Lafourche Parish (North Section) (Map) (January 1, 1958 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1953.
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