Louisiana Highway 100
|Maintained by Louisiana DOTD|
|Length:||14.8 mi (23.8 km)|
|Existed:||1955 renumbering – present|
|West end:||LA 97 in Evangeline|
|LA 91 north of Egan|
|East end:||LA 13 in Crowley|
Route description 
From the west, LA 100 begins at an intersection with LA 97 (Evangeline Highway) in an area known as Evangeline. It proceeds east along Old Evangeline Highway and crosses Bayou Des Cannes and Bayou Pointe Aux Loups. Now known as Shelly Road, LA 100 continues east and intersects LA 91 (Iota Highway) at a point north of Egan. Here LA 100 turns south, beginning a concurrency with LA 91. At the Li & M Canal, the two highways curve to the southwest onto Aspen Road. Reaching Egan, LA 91 and LA 100 turn east onto Egan Highway, running north of and parallel to Interstate 10 (I-10). The concurrency ends just north of I-10 Exit 76 at Estherwood Highway, where LA 91 turns south toward Estherwood and LA 1120 heads to the north. Continuing east and closely following I-10, LA 100 intersects LA 3070 (McCain Road) followed by LA 1121, the latter at a point known as Lawson. LA 100 then crosses Bayou Plaquemine Brule and briefly skirts the northern city limit of Crowley before ending at an intersection at LA 13 (Crowley-Eunice Highway) adjacent to I-10 Exit 80.
LA 100 is an undivided, two-lane highway for its entire length.
In the original Louisiana Highway system, the modern LA 100 formed all of pre-1955 State Route 1045 and part of State Route 370. LA 100 was created with the 1955 Louisiana Highway renumbering, and its route has remained unchanged to the present day.
Major intersections 
The entire highway is in Acadia Parish.
|Evangeline||0.0||0.0||LA 97 (Evangeline Highway) – Jennings, Basile||Western terminus|
|5.3||8.5||LA 91 north (Iota Highway) – Iota||West end of LA 91 concurrency|
|10.1||16.3||LA 91 south / LA 1120 (Estherwood Highway) – Estherwood, Iota||East end of LA 91 concurrency; southern terminus of LA 1120|
|12.1||19.5||LA 3070 (McCain Road)||Southern terminus of LA 3070|
|Lawson||13.7||22.0||LA 1121 (Oro Trail Road)||Southern terminus of LA 1121|
|Crowley||14.8||23.8||LA 13 (Crowley-Eunice Highway) – Crowley, Eunice||Eastern terminus|
- Google Inc. Google Maps – Overview Map of LA 100 (Map). Cartography by Google, Inc. http://maps.google.com/maps?saddr=LA+100+(Western+Terminus)&daddr=30.2442131,-92.5032783+to:LA+100+(Eastern+Terminus)&hl=en&ll=30.233561,-92.486&spn=0.161067,0.338173&sll=30.250764,-92.483253&sspn=0.161038,0.338173&geocode=FZLUzQEdKEZ7-g%3BFXV9zQEdEoN8-indM5OKnlM7hjG5w_FieSakAg%3BFc9fzQEdSE1--g&mra=mrv&via=1&t=m&z=12. Retrieved December 4, 2012.
- Louisiana Department of Transportation and Development (February 2012) (PDF). Acadia Parish (Map). Cartography by La DOTD Office of Multimodal Planning. http://www.dotd.la.gov/planning/mapping/Parish%20Maps/Acadia.pdf. Retrieved December 4, 2012.
- Louisiana Department of Transportation and Development (February 2012) (PDF). District 03: Official Control Section Map / Construction and Maintenance (Map). Cartography by La DOTD Office of Multimodal Planning. http://www.dotd.la.gov/planning/mapping/District%20Maps/District_03.pdf. Retrieved December 4, 2012.
- Louisiana Highway Commission (1937). Acadia Parish (Southwest Section) (Map). Cartography by Louisiana Highway Commission State-wide Highway Planning Survey.
- Louisiana Department of Highways (1954). Acadia Parish (Map). Cartography by Department of Highways Traffic and Planning Section (January 1, 1955 ed.).
- "Act No. 40, House Bill No. 311". State-Times (Baton Rouge). June 18, 1955. p. 3B.
- United States Geological Survey (1961). Basile Quadrangle (Map). 1:62500. 15 Minute (Topographic). Cartography by USGS.
- United States Geological Survey (1956). Crowley Quadrangle (Map). 1:62500. 15 Minute (Topographic). Cartography by USGS.