Highway Improvements

Alternatives

Multiple combinations of highway strategies have been evaluated in the Corridor Study, including the addition of:

The proposed alternatives for the roadway component of the Corridor Study include the addition of general purpose lanes, HOVs or ETLs. Direct access ramps are also being considered to control access to the additional lanes. Collector-distributor lanes and auxillary lanes may also be added to facilitate safe merging on and off the freeway. All of the alternatives examined include additional improvements to the existing roadways, bridges and interchanges.

The following short descriptions of the highway alternatives include links to typical sections showing the proposed condition for US 15 or I-270. Because the highway corridor study area is over 30 miles in length, the corridor has been divided into three segments: US 15, I-270 North (north of Father Hurley Boulevard) and I-270 South (south of Father Hurley Boulevard).

Alternative 1: No-Build Alternative

The No-Build Alternative includes the existing condition and proposed transportation improvements listed in the Metropolitan Washington Council of Governments Constrained Long Range Plan. No major capacity improvements would be made on I-270 or US 15 and only routine maintenance or spot improvements (i.e. resurfacing, signing and/or lighting) would be conducted. Click on the links below to view the US 15, I-270 North and I-270 South typical sections for highway existing conditions.

Alternate 1: Cross Section of U.S. 15

Alternate 1: Cross Section of I-270 North

Alternate 1: Cross Section of I-270 South

US 15 I-270 North I-270 South

Alternative 2: Transportation System Management/Transportation Demand Management

The Transportation System Management / Transportation Demand Management Alternative represents measures to improve overall transportation operations without adding capacity, and strategies to reduce the number of vehicle trips on the corridor highways. These measures and strategies include additional park-and-ride lots, an enhanced rideshare program, and improved pedestrian access to transit stations.

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Alternative 3: Master Plan HOV with Corridor Cities Transitway (CCT)

Alternative 3 involves the addition of a HOV lane on I-270 up to I-70. The lane addition would occur for southbound I-270 in the I-270 South segment, and for both northbound and southbound I-270 in the I-270 North segment. On US 15, a general-purpose lane and an auxiliary lane would be added between I-70 and MD 26. Click on the links below to view the US 15, I-270 North and I-270 South typical sections for highway existing conditions.

 

Alternate 3: Cross Section of U.S. 15

Alternate 3: Cross Section of I-270 North

Alternate 3: Cross Section of I-270 South

US 15 I-270 North I-270 South


Alternative 4: Master Plan General-Purpose with CCT

Alternative 4 includes the addition of a general-purpose lane on I-270 from MD 121 to I-70. In addition, the existing collector-distributor lanes would be extended from I-370 to Father Hurley Boulevard. On US 15, a general-purpose lane and an auxiliary lane would be added between I-70 and MD 26. Click on the links below to view the US 15, I-270 North and I-270 South typical sections for highway existing conditions.

Alternate 4: Cross Section of U.S. 15

Alternate 4: Cross Section of I-270 North

Alternate 4: Cross Section of I-270 South

US 15 I-270 North I-270 South

Alternative 5: Enhanced Master Plan HOV + General-Purpose with CCT or Premium Bus

Alternative 5 includes the addition of a HOV lane and a general-purpose lane on I-270. The HOV lane addition would occur for southbound I-270 in the I-270 South segment, and for both northbound and southbound I-270 in the I-270 North segment. The general-purpose lane addition would occur on I-270 from MD 121 to I-70. In addition, the existing collector-distributor lanes would be extended from I-370 to Father Hurley Boulevard. On US 15, a general-purpose lane and an auxiliary lane would be added between I-70 and MD 26. Click on the links below to view the US 15, I-270 North and I-270 South typical sections for highway existing conditions.

Alternate 5: Cross Section of U.S. 15

Alternate 5: Cross Section of I-270 North

Alternate 5: Cross Section of I-270 South

US 15 I-270 North I-270 South

 

Alternative 6: Master Plan ETL with CCT

Alternative 6 includes the addition of ETLs and a general-purpose lane on I-270. The ETL addition would consist of implementing two ETLs in the I-270 South segment from I-370 to the proposed Newcut Road interchange. One ETL would be constructed in the I-270 North segment from the proposed Newcut Road interchange to north of MD 80. One general-purpose lane would be added in the I-270 North segment from north of MD80 to I-70. The existing northbound collector-distributor lanes (from I-370 to MD 124) and the existing HOV would be removed. On US 15, a general-purpose lane and an auxiliary lane would be added between I-70 and MD 26. Click on the links below to view the US 15, I-270 North and I-270 South typical sections for highway existing conditions.

Alternate 6: Cross Section of U.S. 15

Alternate 6: Cross Section of I-270 North

Alternate 6: Cross Section of I-270 South

US 15 I-270 North I-270 South

 

Alternative 7: Enhanced Master Plan ETL with CCT

Alternative 7 includes the addition of ETLs and two general-purpose lanes on I-270. The ETL addition would consist of implementing two ETLs in the I-270 South and North segments from I-370 to north of MD 80. Two general-purpose lanes would be added in the I-270 North segment from north of MD80 to I-70. The existing northbound collector-distributor lanes (from I-370 to MD 124) and the existing HOV lane would be removed. On US 15, a general-purpose lane and an auxiliary lane would be added between I-70 and MD 26. Click on the links below to view the US 15, I-270 North and I-270 South typical sections for highway existing conditions.

Alternate 7: Cross Section of U.S. 15

Alternate 7: Cross Section of I-270 North

Alternate 7: Cross Section of I-270 South

US 15 I-270 North I-270 South