Interstate 12

Route map:
Source: Wikipedia, the free encyclopedia.

I-10 in Baton Rouge
Major intersections
East end
I-59
in Slidell
Location
CountryUnited States
StateLouisiana
ParishesEast Baton Rouge, Livingston, Tangipahoa, St. Tammany
Highway system
  • Louisiana State Highway System
← US 11→ LA 12

Interstate 12 (I-12) is an intrastate

I-59 in Slidell. Along the way, it passes through the city of Hammond, where it intersects I-55 and US Route 51 (US 51). It also serves the cities of Ponchatoula and Denham Springs, as well as the St. Tammany Parish cities of Covington and Mandeville
.

I-12 parallels the older

North Shore, I-12 acts as a long bypass
of New Orleans and is heavily used as a shortcut for through traffic on I-10. While I-10 curves to the south to pass through the city limits, I-12 takes a more direct alignment, reducing the distance between Baton Rouge and Slidell by about 22 miles (35 km).

In 1993, the Louisiana State Legislature designated I-12 as the Republic of West Florida Parkway. In 2003, signs identifying the highway's official name and bearing the flag of the Republic of West Florida were erected by the Louisiana Department of Transportation and Development (DOTD) in order to highlight the unique history of Louisiana's Florida Parishes.

Louisiana is in the process of widening I-12 to three lanes in each direction in locations such as Covington and Mandeville where the Interstate is still two lanes in each direction.

Route description

Western terminus in Baton Rouge
I-12's eastbound exit to LA 1249, which leads to the communities of Baptist and Pumpkin Center
At the bottom of I-12's eastbound ramp to LA 59, travelers also find a shield for the unrelated I-59, some 20 miles (32 km) farther east

Baton Rouge to Hammond

From the west, I-12 begins three miles (4.8 km) east of downtown

LA 3245 (O'Neal Lane), which serves the Ochsner Medical Center – Baton Rouge and eastern suburbs.[2][3][4]

I-12 reaches the

LA 447
.

Past Walker are smaller communities in the eastern half of the parish. Exits include:

LA 441 serving Holden (exit 29), and LA 43 serving Albany and Springfield (exit 32).[2][5][6]

Shortly after crossing the

US 51 Business, which serves downtown Hammond, as well as the city of Ponchatoula to the south.[2][6][7]

Hammond to Slidell

East of Hammond are two rural exits in southeastern Tangipahoa Parish:

LA 3158 (Airport Road) to Hammond Northshore Regional Airport and LA 445 to Robert
.

Just after crossing into St. Tammany Parish, I-12 curves to the southeast and begins to parallel the North Shore of Lake Pontchartrain. An interchange with LA 1077 serves the town of Madisonville to the south. The following exit, an interchange with LA 21, also connects to Madisonville as well as the parish seat of Covington to the north. Immediately before crossing the Tchefuncte River, an exit to Pinnacle Parkway and East Brewster Road serves the growing shopping area east of LA 21.

Two miles (3.2 km) east of the bridge, I-12 passes through an interchange with

LA 434 to Lacombe.[2][6][8]

I-12 passes through an interchange with Airport Drive 6.3 miles (10.1 km) east of the Lacombe exit, which connects to

I-59 at the northeast corner of town. From this interchange, I-10 heads southwest toward New Orleans and east toward Bay St. Louis, Mississippi, while I-59 heads north toward Hattiesburg, Mississippi.[2][6][9]

History

I-12 was added to the highway system on October 17, 1957, with I-12 running from I-10 in Baton Rouge to I-59 north of Slidell.[10] By the mid-1960s, the routes had been realigned to their current configuration, with I-12 and I-59 both ending at I-10 near Slidell.[11] The route was opened to traffic in several sections between January 1967 and June 1976.[12][13]

With major damage to the I-10 Twin Span Bridge across Lake Pontchartrain from Hurricane Katrina, I-12 was temporarily functioning as I-10 between Baton Rouge and Slidell. On October 14, 2005, the eastbound span of I-10 over Lake Pontchartrain reopened to two-way traffic. The westbound span of I-10 reopened on January 6, 2006, with speed, weight and size restrictions, relieving I-12 of much of the congestion that was clogging it from the Lake Pontchartrain Causeway to the junction with I-10 and I-59.

Since 2012, the DOTD has been widening the Interstate from four lanes to six lanes to accommodate the increasing amount of traffic and make the section safer.[14][15][16][17][18] The I-10/I-12/I-59 split, notorious for rough pavement, was repaved in 2015.[citation needed]

Exit list

ParishLocationmi[19]kmExitDestinationsNotes
New Orleans
Western terminus; signed as exit 1A to I-10 east only; exit 159 on I-10
1.223–
1.649		1.968–
2.654		1B
LA 3064
(Essen Lane)		No westbound exit
2.204–
2.275		3.547–
3.661		1C
LA 1068 (Drusilla Lane) to LA 73 (Jefferson Highway
)		Eastbound entrance and westbound exit
2.608–
3.206		4.197–
5.160		2
Mall at Cortana
3.807–
4.447		6.127–
7.157		4Sherwood Forest Boulevard
5.707–
6.498		9.185–
10.458		6Millerville Road
6.844–
7.454		11.014–
11.996		7O'Neal LaneFormer
LA 3245
Livingston
parish line
Denham Springs8.410–
8.902		13.535–
14.326		Bridge over Amite River
LA 3002 – Denham Springs
​12.442–
13.033		20.023–
20.975		12
LA 1026
(Juban Road)
LA 447 – Walker, Port Vincent
​19.604–
20.359		31.550–
32.765		19
PR 45 – Satsuma, Colyell
LA 63 – Livingston, Frost
​28.667–
29.745		46.135–
47.870		29
LA 441 – Holden
​32.504–
33.334		52.310–
53.646		32 LA 43 – Albany, SpringfieldTo Tickfaw State Park
LA 1249 – Baptist, Pumpkin Center
New Orleans, Jackson
Signed as exits 38A (south) and 38B (north); exit 29 on I-55
40.016–
40.595		64.400–
65.331		40
US 51 Bus. – Hammond, Ponchatoula
​42.378–
43.156		68.201–
69.453		42
Chappapeela Sports Park and Hammond Northshore Regional Airport
​47.418–
48.184		76.312–
77.545		47 LA 445 – Robert
Fairview Riverside State Park
​59.101–
60.138		95.114–
96.783		59 LA 21 – Covington, Madisonville
​60.220–
60.958		96.915–
98.102		60Pinnacle Parkway / East Brewster Road
​60.953–
61.240		98.094–
98.556		Bridge over Tchefuncte River
​62.580–
63.565		100.713–
102.298		63
New Orleans via Lake Pontchartrain Causeway and Bogalusa
​65.710–
66.387		105.750–
106.840		65 LA 59 – Abita Springs, Mandeville
​68.195–
69.101		109.749–
111.207		68
LA 1088 to LA 36 – Mandeville
St. Tammany
to future LA 3241
Slidell Municipal Airport and Camp Villere / Southeast Louisiana Veterans Cemetery
83.620–
84.152		134.573–
135.430		83 US 11 – Slidell, Pearl River
85.375–
86.653		137.398–
139.454		85
New Orleans, Bay St. Louis, Hattiesburg
Eastern terminus of I-12; southern terminus of I-59; signed as exits 85A (I-10 west), 85B (I-59) and 85C (I-10 east); exit 267B on I-10; exit 1C on I-59
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

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References

  1. ^ a b Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved March 20, 2023.
  2. ^ a b c d e Google (June 12, 2013). "Overview Map of I-12" (Map). Google Maps. Google. Retrieved June 12, 2013.
  3. ^ East Baton Rouge Parish (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  4. ^ District 61: Official Control Section Map / Construction and Maintenance (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  5. ^ Livingston Parish (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  6. ^ a b c d District 62: Official Control Section Map / Construction and Maintenance (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  7. ^ Tangipahoa Parish (South Section) (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  8. ^ St. Tammany Parish (West Section) (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  9. ^ St. Tammany Parish (East Section) (PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved June 13, 2013.
  10. ^ Routes to Be Added to the National System of Interstate and Defense Highways (Map). Bureau of Public Roads. October 17, 1957. Retrieved December 8, 2012.
  11. ^ The National System of Interstate and Defense Highways (Map). Bureau of Public Roads. c. 1963. Retrieved December 8, 2012.
  12. ^ "State Highway Work Sets All-Time Mark". The Times-Picayune. New Orleans. January 29, 1967. pp. 8–11.
  13. ^ "Final I-12 Link Opening Today". The Times-Picayune. New Orleans. June 25, 1976. pp. 2–11.
  14. ^ "La DOTD - Projects". wwwapps.dotd.la.gov. Retrieved March 19, 2023.
  15. ^ Ferrando, Erika (October 6, 2020). "Construction happening now to widen I-12 in St. Tammany Parish". WWL-TV. Retrieved March 19, 2023.
  16. ^ "I-12 Widening St. Tammany Parish – Benefits of Transportation". benefits.transportation.org. Retrieved March 19, 2023.
  17. ^ "I-12 Widening (US190 – LA 59) - Louisiana | T Baker Smith Portfolio". T. Baker Smith. Retrieved March 19, 2023.
  18. ^ "Gov. Edwards, DOTD Break Ground on I-12 Expansion in St. Tammany Parish". gov.louisiana.gov. October 5, 2020. Retrieved March 20, 2023.
  19. ^ "La DOTD GIS Data". Louisiana Department of Transportation and Development. September 2015. Retrieved May 23, 2017.

External links

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