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Traveling Maryland's Roundabouts - The Maryland State Highway System

Roundabouts on the Maryland State Highway System

Allegany County
Anne Arundel County
Baltimore County
Caroline County
Carroll County
Calvert County
Cecil County
Charles County
Frederick County
Harford County
Howard County
Kent County
Montgomery County
Prince George's County
Queen Anne's County
Saint Mary's County
Washington County
Wicomico County

Allegany County (2)

  • MD 639 @ North Entrance to Western Maryland Health System (WMHS)
  • MD 639 @ South Entrance to WHMS
    [back]

Anne Arundel County (9)

  • MD 2 @ MD 408/ MD 422
  • MD 450 @ Taylor Avenue/Spa Road
  • MD 32 @ Airfield Road Interchange (2 roundabouts)
  • MD 32 Ramps @ Guilford Rd./National Business Pkwy 
  • MD 32 @ Samford Rd. Interchange
  • MD 2 @ Friendship Road
  • MD 256 @ MD 258
  • MD 175 @ MD 677/Sappington Station Rd.
    [back]

Baltimore County (3)

  • MD 45 (York Rd.) @ MD 146 (Dulaney Valley Rd.)/Joppa Rd./Allegheny Ave.
  • MD 372 @ Hilltop Road/Entrance to UMBC
  • MD 702 @ Hyde Park Road
    [back]

Caroline County (1)

  • MD 307 @ MD 313/MD 318 
    [back]

Calvert County (3)

  • MD 765 @ Calvert Beach Rd
  • MD 765 @ Southern Connector Blvd.
  • MD 760 @ Olivet Beach Rd./Southern Connector Blvd.

Carroll County (6)

  • MD 140 @ MD 832/Antrim Boulevard
  • MD 88 @ MD 833/Lower Beckleysville Road
  • MD 97 @ MD 850 (Old Liberty Road)
  • Relocated MD 30 (Hampstead Bypass) at the northern tie-in (MD 30 Business)
  • Relocated MD 30 at MD 482
  • Relocated MD 30 (Hampstead Bypass) at Phillips Drive/southern tie-in (MD 30 Business)
    [back]

Cecil County (2)

  • MD 213 @ Leeds Road/Elk Mill Road
  • MD 273 @ MD 276
    [back]

Charles County (2)

  • MD 5 @ MD 231 (Hughesville By-pass) (2)

Frederick County (12)

  • MD 17 @ ‘B’ Street/Maryland Avenue
  • MD 17 @ MD 180
  • MD 80 @ Sugarloaf Parkway
  • US 15 @ MD 464
  • MD 80 @ SB I 270 on/off ramp
  • MD 355 Relocated (Worthington Blvd.) @ Sugarloaf Pkwy.
  • MD 355 Relocated (Worthington Blvd.) @ Sprigg Street
  • MD 351 @ Elmer Derr Road
  • MD 17 @ US 340 On/Off Ramps
  • MD 17 @ Dutchman's Creek Drive/Rosemont Ave.
  • MD 17 @ Volunteer Drive
  • MD 475 @ (East St.) @ Franklin Street 
    [back]

Harford County (3)

  • MD 7 @ Holly Oaks Drive
  • MD 165 @ MD 24
  • MD 23 @ Commerce Road
    [back]

Howard County (14)

  • MD 94 @ MD 144
  • MD 94 @ Old Frederick Road
  • MD 100 @ MD 103 Interchange (2 roundabouts)
  • MD 100 @ Snowden River Parkway Interchange
  • MD 100 @ MD 104 Interchange
  • US 29 @ MD 216 Interchange (2)
  • US 29 @ Hopkins–Gorman Road Interchange
  • MD 216 @ Maple Lawn Blvd
  • MD 216 @ Old Columbia Pike (Maple Lawn)
  • MD 32 @ Burntwoods Rd./Ten Oaks Rd. (2)
  • MD 32 @ Pfefferkorn Rd.
    [back]

Kent County (2)

  • US 301 @ MD 291 Interchange (2 Roundabouts)
    [back]

Montgomery County (1)

  • US 29 SB Off Ramp @ Dustin Road

Prince George’s County (6)

  • US 1 @ 34th Street/Perry Street
  • MD 193 @ Oak Grove Rd.
  • MD 637 @ Good Hope Ave.
  • MD 637 @ Oxon Run Dr.
  • I–95 @ Ritchie–Marlboro Road Interchange (2 roundabouts)
    [back]

Queen Anne's County (3)

  • MD 18 @ Castle Marina Road
  • US 50 EB on/off ramp @ Thompson Creek Road
  • MD 835 (Nesbit Rd.) @ Shoreway Drive
    [back]

Saint Mary's County (1)

  • MD 234 @ MD 238

Washington County (2)

  • MD 63 @ MD 58/Cearfoss Pike
  • MD 66 @ Mt. Aetna Road
    [back]

Wicomico County (1)

  • MD 513 Division Street

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