Tunnel Rehabilitation - Revision history

Mnemphos: /* Single Tracking Operations or Service Shutdowns */

2017-09-14T14:52:39Z

‎Single Tracking Operations or Service Shutdowns

Mnemphos: /* Discussion */

2017-09-14T14:51:28Z

‎Discussion

Mnemphos: /* Discussion */

2017-09-14T14:50:50Z

‎Discussion

Mnemphos: /* Discussion */

2017-09-14T14:50:40Z

‎Discussion

Mnemphos: /* Baltimore Metro Subway Tunnel */

2017-09-14T14:50:10Z

‎Baltimore Metro Subway Tunnel

Mnemphos at 14:46, 14 September 2017

2017-09-14T14:46:23Z

Beichhorst at 17:08, 12 May 2017

2017-05-12T17:08:44Z

Beichhorst at 15:47, 12 May 2017

2017-05-12T15:47:02Z

Beichhorst at 15:44, 10 May 2017

2017-05-10T15:44:26Z

Beichhorst at 16:19, 9 May 2017

2017-05-09T16:19:04Z

@@ Line 43: / Line 43: @@
 :::* A feasibility study for construction sequencing, operations impact, service impact, and budget impact should be performed when a service shutdown is proposed. Additional operational cost such as a bus bridge, transit ambassadors, additional field supervision, service schedule change, and revenue loss should all be considered as part of the project budget impact.
 :::* An hour-to-hour construction activity schedule (including the testing and certification activities) should be developed to estimate the required shutdown time.
+:::*Coordinate operations with public relations. Provided information to ridership through press releases, social media posts, and other media outlets.
 [[Category:Practical Design Guidance]]

@@ Line 30: / Line 30: @@
 :* Rehabilitation project design must be closely coordinated with Metro Operations.  Any work inside the tunnel tubes is considered “fouling” the track and typically requires track outage to perform the work.  The typical available track outage hour is from 1:00 am to 3:30 am weekdays and 1:00 am to 4:30 am weekends. When longer shutdowns are necessary, bus bridges should be provided.
 ::* The design should consider:
-:::* Scheduling the work that can be completed in the track outage hour or can be stabilized for the train service to resume until the next track outage hour.
+:::* Scheduling the work that can be completed in the track outage period or can be stabilized for the train service to resume until the next track outage period.
 :::* The storage area and transporting path for the materials and equipment.
 :::* The distance between the access point and the work zone.  Work inside the underground stations, vent shafts, cross passages, emergency stairs that does not foul the track may not be subject to the track outage restriction.  Peak-hour work restrictions, however, will apply to the work in the public area. If access to these ancillary areas requires passing through the tunnel tubes, the track outage restriction will still generally apply.

@@ Line 18: / Line 18: @@
 ::** Fort McHenry Tunnel (FMT) – Interstate 95 under the Patapsco River
 ::** Baltimore Harbor Tunnel (BHT) – Interstate 895 under the Patapsco River
-::* Maryland Department of Transportation Maryland Transit Administration (MDOT MTA)
+::* Maryland Transit Administration (MTA)
 ::** Baltimore Metro – Baltimore Metro Subway under Baltimore City
@@ Line 35: / Line 35: @@
 === Single Tracking Operations or Service Shutdowns ===
-:* Single tracking operations or service shutdowns may be available to provide longer track outage hour, but is subject to MDOT MTA’s approval.
+:* Single tracking operations or service shutdowns may be available to provide longer track outage hour, but is subject to MTA’s approval.
 ::* Single tracking operations:
 :::* Provide a longer track outage hour in one tunnel tube without shutting down the Metro service.
@@ Line 44: / Line 44: @@
 :::* An hour-to-hour construction activity schedule (including the testing and certification activities) should be developed to estimate the required shutdown time.
-[[Category:Practical Design Guidance]][[Category:Secure]]
+[[Category:Practical Design Guidance]]

@@ Line 18: / Line 18: @@
 ::** Fort McHenry Tunnel (FMT) – Interstate 95 under the Patapsco River
 ::** Baltimore Harbor Tunnel (BHT) – Interstate 895 under the Patapsco River
-::* Maryland Transit Administration (MTA)
+::* Maryland Department of Transportation Maryland Transit Administration (MDOT MTA)
 ::** Baltimore Metro – Baltimore Metro Subway under Baltimore City
@@ Line 35: / Line 35: @@
 === Single Tracking Operations or Service Shutdowns ===
-:* Single tracking operations or service shutdowns may be available to provide longer track outage hour, but is subject to MTA’s approval.
+:* Single tracking operations or service shutdowns may be available to provide longer track outage hour, but is subject to MDOT MTA’s approval.
 ::* Single tracking operations:
 :::* Provide a longer track outage hour in one tunnel tube without shutting down the Metro service.

@@ Line 28: / Line 28: @@
 === Baltimore Metro Subway Tunnel ===
-:* Rehabilitation project design must be closely coordinated with Metro Operations.  Any work inside the tunnel tubes is considered “fouling” the track and typically requires track outage to perform the work.  The typical available track outage hour is from 1:00 am to 3:30 am weekdays and 1:00 am to 4:30 am weekends.
+:* Rehabilitation project design must be closely coordinated with Metro Operations.  Any work inside the tunnel tubes is considered “fouling” the track and typically requires track outage to perform the work.  The typical available track outage hour is from 1:00 am to 3:30 am weekdays and 1:00 am to 4:30 am weekends. When longer shutdowns are necessary, bus bridges should be provided.
 ::* The design should consider:
 :::* Scheduling the work that can be completed in the track outage hour or can be stabilized for the train service to resume until the next track outage hour.
 :::* The storage area and transporting path for the materials and equipment.
-:::* The distance between the access point and the work zone.  Work inside the underground stations, vent shafts, cross passages, emergency stairs that does not foul the track may not be subject to the track outage restriction.  Peak-hour work restrictions, however, will apply to the work in the public area. If access to these ancillary areas requires passing through the tunnel tubes, the track outage restriction will still apply.
+:::* The distance between the access point and the work zone.  Work inside the underground stations, vent shafts, cross passages, emergency stairs that does not foul the track may not be subject to the track outage restriction.  Peak-hour work restrictions, however, will apply to the work in the public area. If access to these ancillary areas requires passing through the tunnel tubes, the track outage restriction will still generally apply.
 === Single Tracking Operations or Service Shutdowns ===

@@ Line 23: / Line 23: @@
 === Fort McHenry and Baltimore Harbor Tunnels ===
 :* Rehabilitation project designs must be closely coordinated with the appropriate tunnel operations staff.  In almost all cases, shutting down a tunnel bore for an extended period is not possible due to the resulting severe traffic impacts from the reduced traffic capacity.  Operations staff for both tunnels develop and maintain weekly nighttime closure schedules for the tunnel bores.
-::* BHT: weekly nighttime closures Monday through Thursday only, from 9:00 am to 4:30 am
+::* BHT: weekly nighttime closures Monday through Thursday only, from 9:00 pm to 4:30 am
 ::* FMT: southbound closures 7:00 pm to 4:30 am; northbound closures 8:00 pm to 4:30 am.
 :* Routine maintenance work is scheduled to coincide with nighttime closure schedules and needs to be accounted for during project design.  While closure schedules and maintenance operations are subject to change, they must be used as a basis for developing how proposed rehabilitation work can be performed and sequenced.

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-{| class="wikitable" style="color:#000000; background-color:#FFF5E8;"
+{| class="wikitable"
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 = Discussion =
 == General ==