Colorado State Highway 128

State Highway 128
Route information
Maintained by CDOT
Length:	10.0 mi[1]a[›] (16.1 km)
Major junctions
West end:	SH 93 South of Boulder
	SH 121 in Broomfield U.S. Route 287 in Broomfield
East end:	I-25 exit 223 in Westminster
Highway system
Colorado State Highways ← SH 127 SH 131 →

Going west on Colorado SH 128

State Highway 128 is a 10 mi (16.1 km)^a[›] long state highway in the Denver, Colorado metro area.

Route description

The route begins in the west at a junction with State Highway 93 roughly thirteen miles south of Boulder. From there, the road proceeds eastward into the northern portions of the Denver metropolitan area. The road passes through portions of the cities of Superior, Broomfield, Northglenn, and Westminster and crosses State Highway 121 before being split by a 3.8 mi (6.1 km) section of concurrency with U.S. Highway 287 and again resuming its course towards its eastern terminus at exit 223 of Interstate 25 in the city limits of Westminster.

History

The route was established in the early 1920s, when it began at Federal Blvd and ended at SH 185 (now deleted). A section from U.S. Route 85 to U.S. Route 6 was added by 1939 and deleted by 1949. The west terminus was extended from U.S. Route 36 to Indiana Street in 1965 and to its current terminus at SH 93 two years later.^[2]

Major intersections

County	Location	Mile	Destination	Notes
Boulder		0.000	SH 93
Broomfield	Broomfield	7.973	SH 121
		Gap in SH 128
		12.168	US 287	Interchange
Adams	Thornton	14.113	I-25	Interchange

Notes

^ a: The 3.8 mi (6.1 km) long section of concurrency with US 287 is not maintained with state funds and therefore not considered to be part of SH 128 by the Colorado Department of Transportation.^[1] There is also a brief gap of much less than a mile between the junction of SH 128 and SH 121 and the junction of SH 121 and US 287 that is not even nominally part of SH 128. With these sections included, the total end-to-end length is almost exactly 14 mi (22.5 km).

References

1. ^ ^{a b} "Segment Descriptions for Highway 128". Colorado Department of Transportation. http://www.dot.state.co.us/app_DTD_DataAccess/Highways/index.cfm?fuseaction=Description&route=128&begRefPt=0&endRefPt=500&Printable=true. Retrieved 2008-04-07. 
2. ^ Salek, Matthew E.. "Colorado Routes 120-139". http://www.mesalek.com/colo/r120-139.html#128. Retrieved 2010-05-30.