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Campus Construction Notices

Purple Line Construction Updates


Summary of Major Impacts

Below is a summary of major pedestrian and vehicle detours on campus due to Purple Line and other campus construction. (Detailed construction notices are listed below this summary.)

  • Pedestrian Detours:  All pedestrian detours are ADA-compliant. See detour maps for details.
  • Union Lane is open to 2-way traffic near the Stamp Student Union. See map for details.
  • Campus Drive overnight closures: Campus Drive is closed from Regents Drive (near Symons Hall) to Union Lane (near the Stamp Student Union) daily from 9 p.m. to 7 a.m. the next morning, except when there are major campus events. See detour map for details.
  • Union Drive: Union Drive between Campus Drive (near the Benjamin Building) and Championship Lane is closed. See map for details.
  • Rossborough Lane: East of Baltimore Avenue, the road is closed near Diamondback Drive.

If you have questions or encounter issues while traveling around campus, including accessibility concerns, please contact purpleline@umd.edu.


Important Traffic Safety Considerations for Spring 2024 – 1.22.24

Message to campus 


Sidewalk Closure near the "M" – 4.29.24-8.20.24

Starting on or about Monday, April 29, the Purple Line contractor will close the sidewalk between the “M” and the Clarence M. Mitchell, Jr. Building for approximately 4 months. See map for pedestrian detour.


Campus Drive Traffic Pattern Adjustment – 4.22.24-5.6.24

Starting at 9 p.m. on or about Monday, April 22, 2024 the Purple Line contractor will divert traffic on Campus Drive in front of the Benjamin Building, to the roadway east of the Veterans Memorial Flag Court (near Dorchester Hall). This will last for approximately 2 weeks. See the attached map for the vehicle and pedestrian detours.


Alumni Drive Traffic Pattern Adjustment – 4.20.24

On or about Saturday, April 20, the Purple Line contractor will remove the long-term detour in place at the intersection of Alumni Drive and Union Drive and restore the Alumni Drive roadway and sidewalk to its original location.  See map for details.


Campus Drive 1-Hour Road Closure – 4.20.24

From 7 a.m. to 8 a.m. on Saturday, April 20, the Purple Line contractor will close Campus Drive between Union Lane (near St. Mary’s Hall) and the Benjamin Building. See map for vehicle detour


Campus Drive Sidewalk at St. Mary’s Hall – 4.18.24

On or about Thursday, April 18, the Purple Line contractor will implement a long-term pedestrian detour on the south side of Campus Drive in front of St. Mary’s Hall. See map for details.


Lot HP (near HJ Paterson) East Entrance Closure – 4.17.24-4.21.24

On or about Wednesday, April 17, the Purple Line contractor will close the east entrance of Lot HP (near HJ Patterson Hall) for approximately 4 days. The west entrance will remain open for vehicles to enter and exit the lot. See map for details.


Temporary Bike Path Closure – 4.16.24-4.26.24

On or about Tuesday, April 16, the Purple Line contractor will close the temporary bike path near Hornbake Library for approximately two weeks. The adjacent sidewalk will remain open. See map for details. 


Lot C1/Lot L Connector Road & Sidewalk Closure – 4.15.24-8.20.24

On or about Monday, April 15, the Purple Line contractor will close the connector road and sidewalk between Lot C1 (near Turner Hall) and Lot L (near Reckord Armory) for approximately 4 months. Vehicles will exit Lot C1 to Baltimore Avenue via Rossborough Lane. See map for detours.


Health Center Sidewalk Closure – 4.15.24-5.22.24

On or about Monday, April 15, the Purple Line contractor will close the sidewalk east of the Health Center main entrance for approximately 6 weeks. The main entrance will remain accessible from the west. See map for pedestrian detour.


Sidewalk Closure near the "M" – 4.13.24-4.14.24

Starting at 7 a.m. on Saturday, April 13, Purple Line construction will close a sidewalk near the Engineering Fields and the Clarence M. Mitchell, Jr. Building. The sidewalk will reopen at 5 p.m. on Sunday, April 14. See the attached map for the impacted area and pedestrian detour route. Watch for construction activity and detour signs.


Regents Drive 3-Hour Lane Closure – 4.12.24

On Friday, April 12, the Purple Line contractor will conduct a lane closure on Regents Drive between Campus Drive and the Clarence M. Mitchell, Jr. Building, from 10 a.m. to 1 p.m. Flaggers will direct traffic. See map for details.


Symons Hall Service Parking Lot Closure - 4.10.24-6.10.24

Starting or about Wednesday, April 10, the Purple Line contractor will close the entrance of the parking lot behind Symons Hall for approximately 2 months. Delivery, service and emergency vehicles will enter and exit the lot using a temporary access road on the north side of Symons Hall. See map for details.


Regents Drive Overnight Lane Closures – 4.8.24-4.14.24

Starting or about Monday, April 8, the Purple Line contractor will conduct overnight lane closures on Regents Drive between Campus Drive and Fieldhouse Drive. The closures will occur from 8 p.m. to 5 a.m. for approximately 1 week. Flaggers will direct traffic. See map for details.


Sidewalk Closure – 4.6.24-4.7.24

Starting at 7 a.m. on Saturday, April 6, Purple Line construction will close a sidewalk near the Engineering Fields and the Clarence M. Mitchell, Jr. Building. The sidewalk will reopen at 5 p.m. on Sunday, April 7. See the attached map for the impacted area and pedestrian detour route. Watch for construction activity and detour signs.


Sidewalk Closure – 3.30.24-3.31.24

Starting at 7 a.m. on Saturday, March 30, Purple Line construction will close a portion of sidewalk near the Engineering Fields and the Clarence M. Mitchell, Jr. Building. The sidewalk will reopen at 5 p.m. on Sunday, March 31. See the attached map for the impacted area and pedestrian detour route. Watch for construction activity and detour signs.


Spring Break Road Closures – 3.16.24-3.24.24

Starting at 7 a.m. on Saturday, March 16, through 7 a.m. on Sunday, March 24, the Purple Line project
will close the following roadways for construction activities:

  • Regents Drive between Campus Drive and the Clarence M. Mitchell, Jr. Building
  • Campus Drive between Regents Drive and Union Lane, and between Union Lane and the
    Benjamin Building

See the attached map for vehicle detours. Watch for construction activity and detour signs.


Sidewalk Closure – 3.16.24-3.24.24

The Purple Line project will close a sidewalk near Symons Hall from Saturday, March 16 through Sunday, March 24, 2024. See the attached map for the impacted area and pedestrian detour route. Watch for construction activity and detour signs.


Driskell Center Sidewalks & Entrance Closures – 3.16.24-3.24.24

The Purple Line project will close the entrance to the Driskell Center on Campus Drive from Saturday, March 16, 2024, to Sunday, March 24, 2024.  The sidewalk from Lot Z along Cole Field House will also be closed. See the attached map for the pedestrian detour route and alternate entrance for the Driskell Center. Watch for detour signs and construction activity.


Sidewalk Closure – 3.16.24

On Saturday, March 16, the Purple Line project will close a portion of sidewalk near the Engineering Fields and the Clarence M. Mitchell, Jr. Building, from 7 a.m. to 5 p.m., for construction activities.  See the attached map for the impacted area and pedestrian detour route. Watch for construction activity and detour signs.


Lot HP Entrance Closures – 3.12.24-3.23.24

On Tuesday, March 12, the Purple Line project will begin closures of the entrances of Lot HP on Campus Drive for construction activities. Vehicle and pedestrian traffic in the lot will be maintained by keeping one entrance open at all times.

  • The east entrance will be closed from Tuesday, March 12 to Saturday, March 16
  • The west entrance will be closed from Monday, March 18 to Saturday, March 23

See the attached maps for the work area phases and pedestrian detour routes. Watch for construction
activity and pedestrian detour signs.


Regents Drive Overnight Lane Closures – 3.4.24-3.16.24

On Monday, March 4, the Purple Line project will install utilities at the intersection of Campus Drive and Regents Drive overnight from 9 pm to 6 am. Vehicular traffic will be maintained through the intersection but expect lane closures with flaggers directing traffic. This work is expected to take 2 weeks. See the attached map for the work area. Watch for construction activity and flaggers.


Campus Drive Road Closure – 2.29.24

The Purple Line project will close Campus Drive between Regents Drive and Union Lane on Thursday, February 29, from 4:30 a.m. to 6 a.m., for construction activities.  See the attached map for the vehicle detour route. Watch for construction activity and detour signs.


Sidewalk Closure – 2.24.24

On Saturday, February 24, the Purple Line project will close a portion of sidewalk near the Engineering Fields and the Clarence M. Mitchell, Jr. Building, from 7 a.m. to 5 p.m., for construction activities.  See the attached map for the impacted area and pedestrian detour route. Watch for construction activity and detour signs.


Campus Drive Road Closure – 2.23.24

The Purple Line project will close Campus Drive between Regents Drive and Union Lane on Friday, February 23, from 4:30 a.m. to 6 a.m., for construction activities.  See the attached map for the vehicle detour route. Watch for construction activity and detour signs.


Campus Drive Road Closure – 2.21.24

The Purple Line project will close Campus Drive between Regents Drive and Union Lane on Wednesday, February 21, from 5 a.m. to 6 a.m., for construction activities.  See the attached map for the vehicle detour route. Watch for construction activity and detour signs.


Campus Drive Road & Sidewalk Closure – 2.7.24

Starting on or about Wednesday, February 7, Purple Line construction will permanently close a portion of Campus Drive northwest of Dorchester Hall. See the attached map for vehicle and pedestrian detour routes. Watch for construction activity and detour signage.


Baltimore Avenue & Rossborough Lane Partial Lane Closures – 2.1.24-4.19.24

Purple Line construction will continue at the intersection of Baltimore Avenue and Rossborough Lane through, on or about, April 19. One northbound lane on Baltimore Avenue and one eastbound lane on Rossborough Lane will be periodically closed from 9 a.m. to 3 p.m. Lanes will be shifted to maintain traffic around the work area. The crosswalks across Rossborough Lane on the east side of the intersection will be closed. See attached map for detour routes. Watch for construction activity and shifting traffic.


Campus Drive & Regents Drive Road Closures – 1.10.24

Starting at or about 8 p.m. on Wednesday, January 10, Purple Line construction will close Campus Drive west of Paint Branch Drive and Regents Drive between Fieldhouse Drive and the Clarence M. Mitchell Building for approximately two (2) hours. See attached map for vehicle detour route. Watch for construction activity and detours.


Campus Drive Road Closure – 1.8.24-1.19.24

Starting on or about Monday, January 8, 2024 the Purple Line construction will close Campus Drive west of Union Lane. Union Lane will be open to 2-way traffic. Campus Drive from Regents Drive to the Benjamin Building will be reopened for westbound traffic on Saturday, January 20. See attached map for vehicle detour route. Watch for construction activity and shifting traffic.


Union Lane Road Closure – 12.26.23-12.27.23

On or about Tuesday, December 26, 2023, the Purple Line construction will close Union Lane from Campus Drive to Union Lane Garage for 2 days. Campus Drive will be closed from Regents Drive to Dorchester Hall. See attached vehicle detour map. Watch for construction activity and detours.


Campus Drive Sidewalk Closures – 12.20.23-1.19.24

Starting on or about Wednesday, December 20, Purple Line construction will close portions of the sidewalk on the north side of Campus Drive, between Regents Drive and Union Lane, through January 19, 2024. See attached map for pedestrian detour routes. Watch for construction activity and detour signs.


Campus Drive Road Closure – 12.20.23-1.19.24

On Wednesday, December 20, the Purple Line project will close Campus Drive from Regents Drive to Union Lane. See the attached map for detour routes. Campus Drive will be reopened for westbound traffic on Friday, January 20. Watch for construction activity and detour signs.


Campus Drive Sidewalk Closure – 12.4.23-12.16.23

Starting on or about Monday, December 4, 2023, the Purple Line project will be reconstructing the sidewalks in front of the Microbiology Building and Nyumburu Amphitheater near Campus Drive. See the attached map for details and pedestrian detour routes. This work will take approximately 2 weeks. Watch for construction activity and detour signs.


Alumni Drive Traffic Shift – 11.3.23-4.1.24

Starting on or about Friday, November 3, the Purple Line project will be shifting Alumni Drive through Lot 1 and Lot Z to accommodate the changing work zones. The sidewalk along the east will also be detoured along the temporary roadway. The traffic shift will be required for approximately 6 months. See the attached map for the pedestrian detour route.  Watch for shifting traffic patterns, new traffic signs, and construction activity in the area.


Campus Drive Sidewalk Closures – 10.9.23-10.23.23

On or about Monday, October 9, 2023, the Purple Line project will be reconstructing the sidewalks in front of the Toll Physics Building and Kirwan Hall near Campus Drive and Regents Drive. See attached maps for the work sequence and pedestrian detour routes. This work will take approximately 2 weeks. Watch for shifting construction activity and detour signs.


Rossborough Lane Sidewalk & Lane Closures – 10.2.23-10.9.23

Starting on or about Monday, October 2, 2023, the Purple Line project will close a portion of the sidewalk and one lane of Rossborough Lane near Ritchie Coliseum for approximately 1 week. Flaggers will direct traffic in both directions. See the attached maps for the pedestrian detour route. Watch for flaggers, detour signs and shifting construction activity.


Rossborough Lane Sidewalk Closure – 9.29.23-2.29.24

Starting on or about Friday, September 29, 2023, the Purple Line project will close a sidewalk on Rossborough Lane near Ritchie Coliseum for approximately five months. See the attached map for the pedestrian detour route. Watch for detour signs and construction activity.


Diamondback Drive Sidewalk Closure – 9.12.23-9.15.23

On or about Tuesday, September 12, 2023, the Purple Line project will be performing construction along Diamondback Drive near Lot J1. The crosswalks at the intersection of Diamondback Drive and Rossborough Lane will be closed for 4 days. See the attached map for the pedestrian detour route. Watch for detour signs and construction activity.


Campus Drive Crosswalk Closure – 9.5.23-12.31.23

Starting on or about Tuesday, September 5, 2023, the Purple Line project will close the crosswalk on Campus Drive between Cole Fieldhouse and Dorchester Hall. See the attached map for details and pedestrian detours. Watch for construction activity and detour signs.


Rossborough Lane Road & Sidewalk Closures – 8.22.23-Ongoing

Starting on or about Tuesday, August 22, 2023, the Purple Line project will begin a long-term closure of Rossborough Lane west of Baltimore Avenue (near Turner Hall and Rossborough Inn). 

Lot C1 will be accessed via the southbound Baltimore Avenue lot entrance, and exited to Regents Drive using the new connector road to Lot L.  The Lot C1 entrance will be closed from approximately 10PM to 5AM, daily. 

There will also be sidewalk closures in the area. See the attached map for details and pedestrian detours. Watch for construction activity and detour signs.


Campus Drive and Regents Drive Road Closures – 8.16.23-8.17.23

Starting at 7 p.m. on Wednesday, August 16, through 6 a.m. on Thursday, August 17, 2023, the Purple Line project will close the following roadways to complete the new reconfiguration of the Campus Drive & Regents Drive intersection:

  • Regents Drive between the Geology Building and the Clarence Mitchell Building
  • Campus Drive between Regents Drive and Hornbake Plaza

Following this closure, Campus Drive between Paint Branch Drive and Regents Drive will reopen to east and westbound traffic.

See the attached maps for pedestrian and vehicle detours. Watch for construction activity and detour signs.


Baltimore Avenue Sidewalk Closure – 8.14.23-8.21.23

Starting on or about Monday, August 14, through Monday, August 21 2023, the Purple Line project will close a Baltimore Avenue sidewalk south of Rossborough Lane for utility construction. See the attached map for the location of the work area and pedestrian detour route. Watch for construction activity and detour signs.


Turner Hall Sidewalk Closures – 8.3.23-8.11.23

Starting on or about Thursday, August 3, through Friday, August 11, 2023, the Purple Line project will close some of the sidewalks on the southwest side of Turner Hall for utility construction. See attached map for location of work area and pedestrian detour route. Watch for construction activity and detour signs.


Baltimore Avenue at Rossborough Lane Overnight Lane Closures - 7.26.23-9.8.23

Starting on or about Wednesday, July 26, 2023, the Purple Line project will be performing overnight construction on Baltimore Avenue at Rossborough Lane. The work will occur from 8 p.m. to 7 a.m. daily with the following impacts:

  • One northbound lane of Baltimore Avenue will be closed.
  • One southbound lane of Baltimore Avenue will be closed.
  • The Baltimore Avenue crosswalk at Rossborough Lane will to be closed.

See the attached map for pedestrian detours. Watch for detour signs and shifting construction activity.


Regents Drive Sidewalks & Crosswalk Closure – 7.24.23-Ongoing

Starting on or about Monday, July 24, 2023, the Purple Line project will close portions of sidewalk and a crosswalk of Regents Drive near Symons Hall for utility work. See attached map for location and pedestrian detour route. Watch for detour signs and construction activity.


Rhode Island Avenue/Trolley Trail Closure & Detour – 7.21.23-8.18.23

The Purple Line project will close a portion of the Rhode Island Avenue Trolley Trail at Campus Drive for utility construction starting on or about Friday, July 21, 2023. The work is expected to take approximately 4 weeks. See attached map for location of work area and pedestrian/bike detour route. Watch for construction activity and detour signs.


Baltimore Avenue and Rossborough Lane Intersection – 6.14.23-9.14.23

The Purple Line project will perform utility work on Baltimore Avenue at the Rossborough Lane intersection starting on Wednesday, June 14, 2023 through Thursday, September 14, 2023.  The impacts are as follows:

  • From 7 a.m. to 4 p.m., one northbound lane of Baltimore Avenue will be closed.
  • From 9 a.m. to 4 p.m., one southbound lane of Baltimore Avenue will be closed.

Please see the updated map for the current pedestrian detours. Watch for shifting construction activity and detour signs.


Sidewalk Closed Rossborough Inn – 6.5.23-6.19.23

Starting on or about Monday, June 5, 2023, the Purple Line project will close a portion of the sidewalk north of Rossborough Inn for utility work. See attached map for location. The work will be completed on or about June 19, 2023. Watch for detour signs and construction activity.


Baltimore Avenue and Rossborough Lane Intersection – 4.17.23-4.28.23

On or about Monday April 17, 2023, the Purple Line project will be working at the intersection of Baltimore Avenue and Rossborough Lane. One of the two northbound lanes on Baltimore Avenue approaching the intersection will be closed and northbound left turns onto Rossborough Lane will be prohibited. The work will be completed on or about Friday, April 28, 2023. See the attached map for work zone locations and pedestrian detour route. Watch for detour signs and shifting construction activity.


Campus Drive Closure – 4.4.23-4.5.23

The Purple Line project will close the road in the core of campus from Tuesday, April 4, 2023, at 9:00 p.m. until Wednesday, April 5, 2023, at 6:00 a.m. See the attached traffic detour planCampus Drive will be closed from Paint Branch Drive to Union Drive, Regents Drive will be closed at the traffic circle. Use caution when traveling around campus and watch for shifting construction activity and detour signs.


Campus Drive/Regents Drive Intersection Closed – 3.20.23-3.24.23

From Monday, March 20 through Friday, March 24,2023, the Purple Line project will close the Regents Drive/Campus Drive intersection for repaving. Westbound Campus Drive traffic from Baltimore Avenue will be detoured at Paint Branch Drive. No through traffic will be allowed on northbound or southbound Regents Drive past Campus Drive. See the traffic detour plan in the attached map. Use caution when traveling around campus and watch for shifting construction activity and detour signs.


Heavy Demolition from Regents Drive to Cole Fieldhouse – 3.1.23-3.15.23

Starting on or about Wednesday, March 1 2023, the Purple Line project will perform heavy demolition along Campus Drive from Regents Drive to Cole Fieldhouse. This operation will require loud demolition equipment between the hours from 5pm to 8pm for approximately 2 weeks.


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