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Interstate 370

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Interstate 370 marker

Interstate 370

Route information
Maintained by MDSHA
Length3.13 mi[1] (5.04 km)
Existed1990s–present
NHSEntire route
Major junctions
West endSam Eig Highway/Washingtonian Boulevard in Gaithersburg
Major intersections I-270 in Gaithersburg
MD 355 near Rockville
East endShady Grove Metro Station
Location
CountryUnited States
StateMaryland
Highway system
← MD 368→ MD 370

Interstate 370 (abbreviated I-370) is a 3.13-mile (5.04 km) Interstate Highway spur route off I-270 in Gaithersburg, Maryland to a park and ride lot at the Shady Grove station on the Red Line of the Washington Metro. Despite the number, I-370 does not connect to I-70 itself. The road continues to the west of I-270 as Sam Eig Highway, a surface road. Along the way, I-370 has interchanges with Maryland Route 355 (MD 355), the Intercounty Connector (under construction), and Shady Grove Road. The freeway was completed in the late 1980s to connect I-270 to the Shady Grove Metro station. I-370 was part of the larger Intercounty Connector, but was the only segment to be built at the time. The Intercounty Connector is currently being built east from I-370, with completion expected in Spring 2011.

Route description

I-370 at MD 355, from top-left to center-right

I-370 begins a short distance to the west of the I-270 interchange in Gaithersburg, Montgomery County, heading northeast as a six-lane freeway. Southwest of this interchange, the road continues as Sam Eig Highway, which interchanges with Washingtonian Boulevard before becoming a surface road. The highway passes woods to the northwest and a shopping center to the southeast as it reaches an interchange with I-270. From this point, I-370 turns east and runs between residential neighborhoods to the north and business parks to the south, with trees separating the road from these areas. The freeway curves northeast again and comes to the MD 355 interchange. Past this, the highway passes more commercial development before reaching a bridge over CSX's Metropolitan Subdivision. A short distance later, I-370 comes to the under-construction trumpet interchange with the western terminus of the Intercounty Connector (MD 200). At this point, the freeway curves southeast and comes to the Shady Grove Road interchange. From here, I-370 ends with the road continuing south to the Shady Grove station of Washington Metro's Red Line. Here, it loops through the parking lot of the station.[2][3]

History

What is now I-370 was originally proposed as part of the Intercounty Connector in the late 1970s. The I-370 freeway opened in the late 1980s to connect I-270 to the Shady Grove Metro station. When built, the freeway was four lanes wide and cost $169 million, with federal funds paying for most of the road. At this time, the remainder of the Intercounty Connector was not built.[4] In 2007, construction began on the Intercounty Connector, which is to head east from I-370. At this time, the ramp from Shady Grove Road to westbound I-370 was shifted to a new alignment.[5] In 2009, the lanes along I-370 were shifted to allow for construction of the Intercounty Connector interchange. [6] Construction on this segment of the Intercounty Connector is expected to be completed in Spring 2011.[7]

Exit list

The entire route is in Montgomery County.

Location Mile[2] Destinations Notes
Gaithersburg 0.00 Sam Eig Highway west to MD 119 (Great Seneca Highway) Western terminus
0.43 I-270 (Eisenhower Memorial Highway) – Frederick, Washington D.C.
1.61 MD 355 (Frederick Road) – Rockville, Gaithersburg Town Center Former route of US 240, eastbound exit via Shady Grove Road
2.40

MD 200 east (Intercounty Connector) to I-95 – Silver Spring, Laurel 		Western terminus of MD 200 (under construction)
2.86 Shady Grove Road
3.13 Shady Grove Metro Station Eastern terminus, roadway loops through station area
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

  1. ^ Route Log - Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 2
  2. ^ a b "Highway Location Reference: Montgomery County" (PDF). Maryland State Highway Administration. 2009. Retrieved January 26, 2011.
  3. ^ Google (January 26, 2011). "overview of Interstate 370" (Map). Google Maps. Google. Retrieved January 26, 2011.
  4. ^ Vick, Karl (February 3, 1997). "Md. Tollway Remains a Road Not Taken". The Washington Post. p. A01. Retrieved January 26, 2011. {{cite web}}: More than one of |author= and |last= specified (help)
  5. ^ "Intercounty Connector". The Washington Post. Retrieved January 26, 2011.
  6. ^ "SHA to Temporarily Shift Lanes Along I-370 for Intercounty Connector Construction". Maryland State Highway Administration. June 18, 2009. Retrieved January 26, 2011.
  7. ^ Shaver, Katherine (October 26, 2009). "Connector Road Inches Along". The Washington Post. Retrieved January 26, 2011.

Template:Roads in Montgomery County, Maryland

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