Texas State Highway Spur 399

Spur 399 is a short, limited-access spur highway located in Collin County, Texas, and connects State Highway 121 (SH 121) and the US Highway 75 (US 75, Central Expressway) to SH 5, in McKinney. The highway is just over a mile long, and was originally designated in 1964, but was redesignated in 1989.

State Highway Spur 399
Route information
Maintained by TxDOT
Length1.1 mi[1] (1.8 km)
ExistedMarch 2, 1989[1]–present
Major junctions
West end Sam Rayburn Tollway in Allen
  US 75 / SH 121 in McKinney
East end SH 5 in McKinney
Location
CountiesCollin
Highway system
← Spur 398Spur 400 →

Route description

Spur 399 begins where SH 121 branches off the Sam Rayburn Tollway, to merge with the Central Expressway. After the interchange, the highway passes a few empty commercial building lots, before passing the Collin Higher Education Center to the north, and the Medical Center of McKinney to the south. The frontage roads then, depending on the direction, merge or exit the highway. The road passes a small field, before reaching its eastern terminus, an at-grade intersection with SH 5.[2][3] The freeway portion of the highway contains only one exit, for US 75 south, from the eastbound lanes, but the highway's frontage roads give access to and receive access from both directions of the Central Expressway.[4]

History

Spur 399 was designated on May 4, 1964 from US 75 to SH 5. On March 2, 1989, it was transferred to SH 121, and Spur 399 was reused for old SH 121 instead.

Exit list

The entire route is in Collin County.

Locationmi[5]kmDestinationsNotes
Allen0.00.0 Sam Rayburn Tollway southWestern terminus; merges into SRT
McKinney0.81.3 To US 75 north / SH 121 north (Medical Center Drive)No signage for US 75 / SH 121 eastbound, access to Medical Center of McKinney
1.21.9 US 75 south – DallasWestbound exit only
1.82.9 SH 5At-grade intersection, eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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See also
  •  Texas portal
  •  U.S. Roads portal

References
  1. Transportation Planning and Programming Division (n.d.). "State Highway Spur No. 399". Highway Designation Files. Texas Department of Transportation. Retrieved March 29, 2012.
  2. Staff. "NTTA: Projects - Sam Rayburn Tollway". North Texas Tollway Authority (NTTA). Archived from the original on April 2, 2012. Retrieved March 29, 2012.
  3. Staff. "Sam Rayburn Tollway/Central Expressway Interchange - Project Map (Original Version)" (PDF). NTTA. Retrieved April 2, 2012.
  4. Staff. "Sam Rayburn Tollway/Central Expressway Interchange - Project Map (Updated Version)" (PDF). NTTA. Retrieved March 29, 2012.
  5. Google (March 29, 2012). "Overview Map of Spur 399" (Map). Google Maps. Google. Retrieved March 29, 2012.
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