Table of Contents Page Executive Summary ...................................................................................................................................................................................... 9 Components and Sources of Data ............................................................................................................................................................................... 9 Summary of Findings ................................................................................................................................................................................................... 9 Key Terms and Definitions .................................................................................................................................................................................................................... 10 Roadway Congestion ............................................................................................................................................................................................................................ 11 Intersections .......................................................................................................................................................................................................................................... 12 Bicycle and Pedestrian .......................................................................................................................................................................................................................... 12 Public Transportation ........................................................................................................................................................................................................................... 12 Introduction ............................................................................................................................................................................................... 14 Transportation Trends .............................................................................................................................................................................................. 14 Changes in the Transportation Industry .................................................................................................................................................................... 15 Roadway Mobility Analysis ......................................................................................................................................................................... 17 County Overview....................................................................................................................................................................................................... 18 Summary of Roadway Conditions in 2015 ........................................................................................................................................................................................... 20 Congestion Trends ................................................................................................................................................................................................................................ 20 Aspen Hill and Olney Vicinity ..................................................................................................................................................................................... 21 Norbeck Road (MD-28) from Baltimore Road (northernmost intersection) to MD-182 .................................................................................................................. 22 Georgia Ave (MD-97) from Aspen Hill Rd to Brookeville Rd ............................................................................................................................................................... 23 Bethesda Central Business District, Bethesda/Chevy Chase, and Friendship Heights ................................................................................................ 24 Connecticut Avenue (MD-185) from DC line to Capital Beltway (I-495)............................................................................................................................................ 25 MD-355 from DC line to Capital Beltway (I-495) ................................................................................................................................................................................. 26 Clarksburg ................................................................................................................................................................................................................. 27 Ridge Road (MD-27) from Brink Road to Davis Mill Road ................................................................................................................................................................... 28 Frederick Road (MD-355) from Brink Road to Comus Road ............................................................................................................................................................... 29 Damascus .................................................................................................................................................................................................................. 30 Ridge Road (MD-27) from Davis Mill Road to Gue Road .................................................................................................................................................................... 31 Cloverly, Fairland/Colesville, White Oak .................................................................................................................................................................... 32 Columbia Pike (US-29) from University Boulevard (MD-193) to Sandy Spring Road (MD-198) ....................................................................................................... 33 2017 Mobility Assessment Report | Planning Board Draft | February 2017 1 New Hampshire Avenue (MD-650) from Capital Beltway (I-495) to Ednor Road ............................................................................................................................. 34 Gaithersburg, R&D Village, North Potomac, and Montgomery Village ...................................................................................................................... 35 Clopper Road (MD-117) from Longdraft Road to South Summit Avenue ......................................................................................................................................... 36 Frederick Road (MD-355) from I-370 to Plummer Drive .................................................................................................................................................................... 37 Germantown Town Center, Germantown East, Germantown West .......................................................................................................................... 38 Frederick Road (MD-355) from Plummer Road to Brink Road ........................................................................................................................................................... 39 Clopper Road (MD-117) from Longdraft Road to Richter Farm Road ................................................................................................................................................ 40 North Bethesda, White Flint, Twinbrook, Grosvenor ................................................................................................................................................. 41 Old Georgetown Road (MD-187) from the Capital Beltway (I-495) to Rockville Pike (MD-355) ...................................................................................................... 42 Randolph Road from Gaynor Road to Rockville Pike (MD-355) ......................................................................................................................................................... 43 Potomac ................................................................................................................................................................................................................... 44 River Road (MD-190) from the Capital Beltway (I-495) to Piney Meetinghouse Road ..................................................................................................................... 45 Montrose Road from I-270 to Falls Road (MD-189) ........................................................................................................................................................................... 46 Rockville City, Rockville Town Center Shady Grove Metro Center, Derwood ............................................................................................................. 47 Veirs Mill Road (MD-586) from Twinbrook Parkway to Jefferson Street ........................................................................................................................................... 48 MD-28 from Baltimore Road to Veirs Mill Road (MD-586) and from Rockville Pike (MD-355) to Shady Grove Road .................................................................... 49 Rural East 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