Interstate 495 (Delaware)

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Interstate 495 marker

Interstate 495
Route information
Maintained by DelDOT
Length: 11.47 mi[1] (18.46 km)
Existed: 1970s – present
Major junctions
South end: I‑95 / US 202 / I‑295 in Newport
  US 13 in Minquadale
DE 9A in Wilmington
US 13 / DE 3 in Edgemoor
US 13 in Claymont
North end: I‑95 / DE 92 in Claymont
Highway system

Routes in Delaware

DE 491 I‑895

Interstate 495 (abbreviated I-495) in Delaware is a six-lane bypass of Interstate 95 around the city of Wilmington, Delaware. As a major bypass, officials in the Delaware Department of Transportation (DelDOT) have encouraged through traffic (by placing the "Baltimore" and "Philadelphia" control cities on its green signs) to use I-495 instead of I-95, as it has six lanes and a higher speed limit (65 mph instead of 55 mph (89 km/h) on I-95).

Route description[edit]

Interstate 495 southbound along the Delaware River between Claymont and Edgemoor.

I-495 begins at an interchange with I-95/US 202 and I-295 near Newport, heading to the east on a six-lane freeway. At the southern terminus, southbound I-495 also has a ramp that provides easier access to the DE 141 interchange along I-95. The route runs between the Christina River to the north and a landfill to the south prior to reaching an interchange with US 13 to the north of Wilmington Manor. Past this, the highway enters industrial areas and reaches the DE 9A exit near the Port of Wilmington, turning to the northeast. I-495 crosses over the Christina River into the eastern part of Wilmington and passes near another landfill as it comes to the Twelfth Street exit. The road runs through some marshland before coming to an interchange in industrial Edgemoor that connects to the southern terminus of DE 3 as well as to US 13. Following this interchange, I-495 runs between US 13 and suburban areas to the west and Amtrak’s Northeast Corridor and the Delaware River to the east. I-495 continues along this configuration until it reaches Claymont. US 13 heads farther west from the freeway and I-495 makes a turn to the north away from the railroad tracks and the river near the Claymont SEPTA station. The road comes to another exit for US 13 before merging into I-95 at the DE 92 interchange near the Tri-State Mall and the Pennsylvania border. Southbound, the I-495 splitoff from I-95 actually starts in Pennsylvania, but crosses into Delaware before the exit to DE 92.[2][3]

History[edit]

Interstate 495 northbound approaching the bridge over the Christina River

Built in 1974,[4]:2 the highway opened as the "Wilmington Bypass" and between 1978 and 1982 provided routing of I-95 around Wilmington while the original highway through the city, redesignated as Interstate 895, was reconstructed at the Wilmington Viaduct. In 1982, I-95 was rerouted back onto the original highway, and the bypass became I-495 again. A similar occurrence happened in 2000 when I-95 was closed off for a total rebuilding project between U.S. Route 202 and the Pennsylvania state line.

Although it is the most recent of Delaware's three Interstate Highways, I-495 was rebuilt in the mid-1990s when the concrete surface, developed in France, failed prematurely and had to be totally replaced in sections, resulting in one-lane operations for nearly four years (a similar total rebuilding project had to be done on Delaware Route 141 in Newport in the early 2000s). In addition, the bridge over the Christina River, at the Port of Wilmington, suffered severe damage when a truck went over the side of the bridge and exploded on impact, damaging support beams, and forcing traffic onto I-95, creating traffic snarls on the four-lane highway.

Since 2000, DelDOT officials have proposed rerouting I-95 back onto I-495 in the same arrangement used between 1978 and 1982, and renaming the current I-95 through Wilmington as Business 95, like that on Interstate 83 in York, Pennsylvania. The mayor of Wilmington staunchly rejected the proposal.

June 2014: I-495 northbound closed at the DE 9A exit (exit 2) due to tilting support columns on the Christina River bridge

On June 2, 2014, the bridge over the Christina River was closed after it was discovered that four support columns were tilting.[5] In addition, officials announced that I-495 was closed northbound at Terminal Avenue, which leads to the port. Southbound traffic was being diverted off at 12th Street after initially not being able to get on at the PA/DE State Line. DelDOT officials at first said that the bridge would remain closed indefinitely.[6] They later announced plans to have the southbound side of the bridge reopen by Labor Day of 2014, with the northbound side to follow by late September.[7] The southbound lanes reopened on July 31,[8] a month earlier than expected, and the northbound lanes reopened on August 23.[9]

Christina river bridge[edit]

The bridge has a numerical designation of "1-813".[4]:2 The bridge is 4,800 feet of concrete deck supported on steel beams and has 38 spans.[4]:2 The ground beneath the bridge consists of ~100 ft of soft organic clay above a layer of dense sand, then a layer of stiff silty clay which sits atop bedrock; piles anchoring the bridge penetrate into the stiff silty clay but do not reach bedrock.[4]:5

Exit list[edit]

The entire route is in New Castle County.

Location Mile[2] km Exit Destinations Notes
Newport 0.00 0.00
I‑95 south – Newark, Baltimore
Southern terminus
DE 141 – Newport, New Castle Southbound exit; eliminates weaving between I-95/I-495 jct & DE 141, access to Wilmington-Philadelphia Regional Airport
5C I‑295 north – Delaware Memorial Bridge, New JerseyNew York Southbound exit
Minquadale 1.98 3.19 1
US 13 / US 13 Bus. to US 40 – Wilmington, Dover
No ramp from I-495 northbound to US 13 southbound or from US 13 northbound to I-495 southbound, access to Wilmington Station
Wilmington 2.97 4.78 2 DE 9A (Terminal Avenue) – Port of Wilmington
4.45 7.16 3 12th Street
Edgemoor 5.97 9.61 4 US 13 (Governor Printz Boulevard) / DE 3 (Edgemoor Road) – Edgemoor Industrial Park
Claymont 10.83 17.43 5 US 13 (Philadelphia Pike) – Claymont
6 DE 92 (Naamans Road) Southbound exit
11.47 18.46 I‑95 north – Chester, Philadelphia Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]

References[edit]

  1. ^ Route Log- Auxiliary Routes of the Eisenhower National System of Interstate and Defense Highways - Table 2
  2. ^ a b "Traffic Count and Mileage Report: Interstate, Delaware, and US Routes" (PDF). Delaware Department of Transportation. 2008. Retrieved 2010-04-15. 
  3. ^ Google Inc. "overview of Interstate 495". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=39.71143,+-75.58475&daddr=I-95+and+I-495+claymont,+de&geocode=FcbyXQIdEqt--w%3BFZOGXwIdnquA-yl36ZqSFeTGiTEJySru5XgUDw&hl=en&mra=ls&sll=39.706989,-75.586967&sspn=0.02846,0.084543&ie=UTF8&t=h&z=12. Retrieved 2010-05-05.
  4. ^ a b c d "I-495 Bridge Update" (PDF). Delaware Department of Transportation. 18 June 2014. Retrieved 22 June 2014. 
  5. ^ "I-495 Closed at Bridge Over Christina River". Philadelphia: WCAU-TV. June 2, 2014. Retrieved June 2, 2014. 
  6. ^ "I-495 Bridge Over Christina River To Remain Closed Indefinitely". Philadelphia: KYW-TV. June 2, 2014. Retrieved June 4, 2014. 
  7. ^ "Delaware I-495 bridge closed through summer". The News Journal (Wilmington). June 10, 2014. Retrieved June 10, 2014. 
  8. ^ "Damaged Delaware bridge on I-495 partially reopens". Harrisburg, PA: WHTM-TV. Associated Press. July 31, 2014. Retrieved August 3, 2014. 
  9. ^ "All I-495 lanes open". The News Journal (Wilmington). August 23, 2014. Retrieved August 24, 2014. 

Route map: Google / Bing