Interstate 25 North - Denver to Thornton

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North

I-25/U.S. 87 north enters Adams County into an industrial area of North Washington ahead of Exit 215.
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SH 53 lines E 58th Avenue west 0.24 miles onto parallel Broadway north. Measuring 1.66 miles in length, SH 53 connects I-25 in North Washington with SH 224 (70th Avenue) at Twin Lakes.
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The diamond interchange (Exit 215) with SH 53 (58th Avenue) lies one mile south of the exchange joining I-25/U.S. 87 with Interstate 76.
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Exits for I-76, SH 224 (E 70th Avenue) and U.S. 36 (Denver-Boulder Turnpike) west depart from I-25/U.S. 87 north over the course of 1.4 miles.
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Running between the north and south roadways for Interstate 25, the tolled Express Lanes partition with ramps for both SH 224 and U.S. 36 west to Boulder.
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The western section of Interstate 76 originates from I-70 along the Arvada and Wheat Ridge city line. Traveling northeast from the Denver metropolitan area, I-76 heads to I-80 near Big Springs, Nebraska.
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This stretch of Interstate 25 through western Adams County was reconstructed as part of the Mousetrap construction projects in the 1990s and 2000s.
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Exit 216 separates from I-25/U.S. 87 northbound as a distributor roadway for ramps to I-76 east to Fort Morgan, west to I-70 for Grand Junction and SH 224 (70th Avenue) beyond Clear Creek.
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Interstate 76 parallels the South Platte River northeast from Commerce City and Brighton to Sterling and Julesburg.
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Tolled Express Lanes extend northwest from I-25 along U.S. 36 toward Boulder.
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The Denver-Boulder Turnpike was built in 1952 and a toll road until 1967. U.S. 36 was extended northwest from Colfax Avenue and Broadway in Denver over the turnpike in 1967.
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Prior to 1976, I-76 was Interstate 80S. Within Colorado, I-76 measures 184.14 miles. The connection with I-80 east to Omaha in Nebraska is just 2.48 miles in length.
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U.S. 36 emerges from I-270 northwest along a freeway between unincorporated Twin Lakes and Sherrelwood. A heavily traveled commuter route, U.S. 36 along the Denver-Boulder Turnpike links the cities of Westminster, Broomfield and Louisvile and the town of Superior.
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Beyond the Denver-Boulder Turnpike, U.S. 36 enters the city of Boulder by the University of Colorado on 28th Street. U.S. 36 continues northwest to Lyons, Estes Park and U.S. 34 in Rocky Mountain National Park.
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There is no direct access from I-25/U.S. 87 north to I-270/U.S. 36 east, as I-76 connected the two previously. The systems exchange with the Denver-Boulder Turnpike was completed in 2005.
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The tolled Express Lanes continue north along Interstate 25 through the city of Thornton.
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The first of two exits for Thornton is the diamond interchange (Exit 219) with 84th Avenue.
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The Water World theme park lies northwest of Exit 219 at Pecos Street and W 88th Avenue.
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RTD bus ramps line both sides of Interstate 25 at the Thornton Park and Ridge lots adjacent to 88th Avenue.
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Passing by the Thornton Town Center, I-25/U.S. 87 north enter the city of Northglenn. The "Center of the Future", Northglenn incorporated in April 1969 and rests at an elevation between 5160 and 5222 feet above sea level.
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Continuing north, the succeeding exit is with SH 128 west along 120th Avenue.
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SH 128 (120th Avenue) runs west across the city of Westminster to U.S. 287 in Broomfield and Rocky Mountain Metropolitan Airport (BJC).
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A 14.11 mile long route, SH 128 heads west to SH 93 south of Boulder. 120th Avenue extends 5.39 miles east from Exit 223, joining Northglenn and Thornton with U.S. 85 between Brighton and Commerce City.
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The decorative overpass for 136th Avenue at Exit 225 was completed in 2004.
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Interstate 25 converges with the E-470 and Northwest Parkway toll roads at a systems interchange (Exit 228) along the Broomfield city and county line.
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The E-470 beltway encircles the Denver metropolitan area to the east from Broomfield to Denver International Airport (DEN) and south through Aurora to I-25/C-470 at Lone Tree.
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Northern Parkway opened on November 24, 2003 west from Exit 228 to Lafayette and S 96th Street in Broomfield. Inventored as SH 470N, the toll road is 8.05 miles long.
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