Delaware Route 100

Delaware Route 100
Route information
Maintained by DelDOT
Length:	8.97 mi[1] (14.44 km)
Major junctions
South end:	DE 4 near Elsmere
	DE 2 in Elsmere DE 34 north of Elsmere DE 48 west of Wilmington DE 141 west of Wilmington DE 52 in Greenville DE 92 in Montchanin
North end:	Chadds Ford Road at Pennsylvania border near Montchanin
Highway system
Routes in Delaware ← I-95 US 113 →

Delaware Route 100 (DE 100) is a state highway in New Castle County, Delaware. The route runs from Delaware Route 4 near Elsmere to the Pennsylvania border near Montchanin, where it continues into Pennsylvania as Creek Road. At the Pennsylvania border, Delaware Route 100 used to connect to Pennsylvania Route 100, however Pennsylvania Route 100 south of Exton was re-routed onto an expressway connector to end at U.S. Route 202 north of West Chester, Pennsylvania in 2003 (thus no longer reaching the Delaware border). DE 100 was first designated in the 1930s to run from DE 52 to the Pennsylvania border. By the 1970s, it was extended south to DE 4. The route was realigned to follow parts of DE 48 and DE 141 by 1990.

Route description

Delaware Route 100 heads north from DE 4 on the one-way pair of Race Street northbound and Dupont Road southbound. It follows these one-way streets briefly until it merges onto the four-lane, divided Dupont Road. It heads north into Elsmere, crosses over CSX's Philadelphia Subdivision and then intersects Delaware Route 2. It then heads north as a two-lane, undivided road and intersects the eastern terminus of Delaware Route 34 just to the north of Elsmere. It then heads north and meets Delaware Route 48 along the western city limit of Wilmington.^[1][2]

DE 100 heads west with DE 48 on the Lancaster Pike, passing through suburban areas. It then makes a right turn to head north along with Delaware Route 141 on the four-lane, divided Centre Road. The road eventually becomes Barley Mill Road and turns into an expressway, passing under a railroad line and intersecting Delaware Route 52 at a partial cloverleaf interchange in Greenville. Just past the interchange, DE 100 departs from DE 141 by making a left turn onto Montchanin Road.^[1][2]

The route heads north on Montchanin Road, passing through wealthy suburban areas. It passes through the community of Montchanin and continues north, passing by the back entrance to the Winterthur Museum. It then makes a left turn, retaining the name Montchanin Road, near the entrance to Brandywine Creek State Park, where Delaware Route 92 continues straight on Thompson Bridge Road. DE 100 heads north to the Pennsylvania border, where it becomes Chadds Ford Road and continues north into Pennsylvania, paralleling the Brandywine Creek.^[1][2]

History

By 1920, what is now DE 100 existed as a county road.^[3] The route north of Kennett Pike was proposed as a state highway by 1924.^[4] The route was paved by 1931.^[5] By 1932, the state highway had been completed from Elsmere north to the Kennett Pike while the remainder was still a county route.^[6] When Delaware assigned state highways numbers by 1936, the road remained unnumbered.^[7] By 1938, DE 100 was designated to run from DE 52 in Greenville north to the Pennsylvania border, where it continued as PA 100.^[8] DE 100 was extended south to DE 4 by 1971, following Dupont Road.^[9] The route was realigned to bypass a portion of Dupont Road by following DE 48 and DE 141 by 1990.^[10]

Major intersections

The entire route is in New Castle County.

Location	Mile[1]	Road	Notes
Elsmere	0.00	DE 4 (Maryland Avenue)	Southern terminus
	0.73	DE 2 (Wilmington Avenue)
	1.41	DE 34 west (Faulkland Road)
Wilmington	1.64	DE 48 east (Lancaster Avenue)	South end of DE 48 overlap
	2.67	DE 48 west (Lancaster Pike) / DE 141 south (Centre Road)	North end of DE 48 overlap, south end of DE 141 overlap
Greenville	3.86	DE 52 (Kennett Pike) – Greenville, Wilmington	Interchange
	4.12	DE 141 north (Barley Mill Road)	North end of DE 141 overlap
Montchanin	6.26	DE 92 east (Thompson Bridge Road)
	8.97	Chadds Ford Road north	Pennsylvania state line, northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

• U.S. Roads portal
• Delaware portal

References

1. ^ ^{a b c d e} http://www.deldot.gov/information/pubs_forms/manuals/traffic_counts/2006/pdf/rpt_pgs1_38_rev.pdf DelDOT 2006 Traffic Count and Mileage Report
2. ^ ^{a b c} Google, Inc. Google Maps – overview of Delaware Route 100 (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=DE+4+and+DE+100&daddr=39.7679519,-75.5977773+to:montchanin+road+and+creek+road&geocode=FcM5XgIdXqx--ymlQ7RBeALHiTFLLzCTje_fKg%3BFY_PXgIdL3h--ym3LpTcyf3GiTEielZ9e9n_6A%3BFRLdXwIdnnV--ymrIcuPwPvGiTFyWzwkJkuADg&hl=en&mra=dpe&mrcr=0&mrsp=1&sz=12&via=1&sll=39.783275,-75.59132&sspn=0.120308,0.338173&ie=UTF8&t=h&z=12. Retrieved February 6, 2011. 
3. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1920 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_002.pdf. Retrieved April 15, 2010. 
4. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1924 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_003.pdf. Retrieved August 1, 2010. 
5. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1931 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_005.pdf. Retrieved August 19, 2010. 
6. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1932 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_006.pdf. Retrieved February 6, 2011. 
7. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1936/37 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_008.pdf. Retrieved April 15, 2010. 
8. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1938 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_010.pdf. Retrieved February 6, 2011. 
9. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1971 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_050.pdf. Retrieved April 15, 2010. 
10. ^ Delaware Department of Transportation (PDF). Delaware Official Highway Map (Map) (1990 ed.). http://www.deldot.gov/archaeology/historic_pres/historic_highway_maps/pdf/cd_070.pdf. Retrieved February 6, 2011.