MTA Purple Line Bethesda - New Carrollton Light Rail

Discussion related to DC area passenger rail services from Northern Virginia to Baltimore, MD. Includes Light Rail and Baltimore Subway.

Moderators: Robert Paniagua, therock

Re: Washington Metro Purple line

Postby Sand Box John » Tue Apr 12, 2016 7:12 am

"farecard"
The cat standoff distance really becomes an issue only when in tunnels. Higher ceilings co$t more there.


The Purple line has no tunnels, so standoff will not be that big of an issue. The existing vertical clearance under the Air Rights Building and Wisconsin Avenue is greater then the minumn. The documents do note an issue with the Paint Branch Parkway underpass in Collage Park. Page 373 of MTA - Purple Line - P3 Agreement with Exhibits - Execution Version (37.9 MB PDF file).

    "Concessionaire shall design and construct portions of the Paint Branch Parkway below WMATA and CSXT Bridges to meet applicable clearance requirements relating to the Purple Line System operating a 1,500 VDC. In addition, Concessionaire Shell Construct, or otherwise provide a new lift station with capacity equal to, or greater then the existing lift station and remove the existing lift station in accordance with SHA standard Specification for Construction and Materials, Section 207."
John in the sand box of Maryland's eastern shore.
User avatar
Sand Box John
 
Posts: 2724
Joined: Sun Jan 01, 2006 8:55 pm
Location: Hebron Maryland

Re: Washington Metro Purple line

Postby farecard » Tue Apr 12, 2016 8:21 am

gokeefe wrote:Just be happy its getting built. As long as it actually runs it will be unstoppable. There's plenty of money in the coffers for future upgrades should they be necessary. The only thing I would be watching for is if the system specs (transmission voltages in particular) would really hold back expansion. I haven't gotten that impression at all.


Not disagreeing. The cat voltage is fine; when they run out of capacity it is fixable with added power stations or upgrades to the existing ones. I'm not aware of anything less than the PRR/Amtrak NEC that runs at higher voltages.

The parts that infuriate me are those where the skimping damage is irreparable; the biggest of all is the Silver Spring No-Transit Center.
User avatar
farecard
 
Posts: 669
Joined: Thu Oct 02, 2008 2:40 am

Re: Washington Metro Purple line

Postby gokeefe » Tue Apr 12, 2016 9:06 am

I would posit in that case that the damage isn't so much irreparable as it is exceptionally expensive to fix in the future.
gokeefe
User avatar
gokeefe
 
Posts: 9813
Joined: Sat Feb 16, 2008 12:28 pm
Location: Winthrop, Maine

Re: Washington Metro Purple line

Postby Sand Box John » Tue Apr 12, 2016 9:10 am

"farecard"
I'm not aware of anything less than the PRR/Amtrak NEC that runs at higher voltages.


The Black Mesa and Lake Powell uses a 50 KV contact wire voltage. The railroad uses the freight version of the General Electric E60 that Amtrak retired long ago. The Amtrak E60 were capable of running on 11, 25 and 50 KV.
John in the sand box of Maryland's eastern shore.
User avatar
Sand Box John
 
Posts: 2724
Joined: Sun Jan 01, 2006 8:55 pm
Location: Hebron Maryland

Re: Washington Metro Purple line

Postby farecard » Tue Apr 12, 2016 9:13 am

gokeefe wrote:I would posit in that case that the damage isn't so much irreparable as it is exceptionally expensive to fix in the future.


You could say the same thing about the Silver Line Tyson's tunnel, and its service to IAD parking vs. IAD.
Or the decision to be a 2-track system.....
User avatar
farecard
 
Posts: 669
Joined: Thu Oct 02, 2008 2:40 am

Re: Washington Metro Purple line

Postby gokeefe » Tue Apr 12, 2016 9:16 am

I don't think the two are comparable because of the cost scales involved. Tysons is orders of magnitude more expensive to fix than the Purple Line in Silver Spring (my impression).
gokeefe
User avatar
gokeefe
 
Posts: 9813
Joined: Sat Feb 16, 2008 12:28 pm
Location: Winthrop, Maine

Re: Washington Metro Purple line

Postby farecard » Tue Apr 12, 2016 10:30 am

If you think the county-club crowd hates the Purple line crossing their golf course land, just wait until you start running a few E60's back & forth....
User avatar
farecard
 
Posts: 669
Joined: Thu Oct 02, 2008 2:40 am

Re: Washington Metro Purple line

Postby MCL1981 » Tue Apr 12, 2016 11:26 am

I was thinking the rail grinders and ballast vacs would be kinda fun to run through there.
MCL1981
 
Posts: 575
Joined: Sun Nov 11, 2012 9:23 am

Re: Washington Metro Purple line

Postby Jeff Smith » Mon Jul 18, 2016 4:13 pm

Construction Dive

Although nominally an article on the proposed Miami Beach LRT, there's a side comment on the Purple Line:

Expediency is also a concern for officials who are trying to get the $5.6 billion, 16-mile Purple Line light rail system in Maryland underway. Some Chevy Chase, MD, residents, who reportedly have been against construction of the new rail line since its inception, requested another six-month ridership survey that rail officials said could put the entire project in jeopardy. Unlike the Miami Beach project, however, the Purple Line is receiving a considerable amount of federal funding – $900 million.
Next stop, Willoughby
~Jeff Smith (fka "Sarge") :: RAILROAD.NET Site Administrator
Jeff Smith
Site Admin
 
Posts: 7443
Joined: Tue Nov 07, 2006 9:28 am
Location: MP 67.2 Georgia Southern Railway

Re: MTA Purple Line Bethesda - New Carrollton Light Rail

Postby Jeff Smith » Mon Jul 18, 2016 4:18 pm

Can someone knowledgeable about the project briefly summarize? Is this a Metro or MTA project? I.e. DC vs. MD. And what are the endpoints? Chevy Chase to?
Next stop, Willoughby
~Jeff Smith (fka "Sarge") :: RAILROAD.NET Site Administrator
Jeff Smith
Site Admin
 
Posts: 7443
Joined: Tue Nov 07, 2006 9:28 am
Location: MP 67.2 Georgia Southern Railway

Re: MTA Purple Line Bethesda - New Carrollton Light Rail

Postby realtype » Mon Jul 18, 2016 4:27 pm

The Purple Line Light Rail project is being administered by the MTA, but will be constructed and operated by a private concessionaire--a consortium of companies including Meridiam Infrastructure, Fluor Enterprises Inc.,Star America, and CAF USA.

The 16.2 mile line is entirely located within Montgomery and Prince George's counties in Maryland and will travel through the dense inner-Beltway suburbs and urban centers between Bethesda, MD and New Carrollton, MD. It will connect 4 branches of WMATA Metro, three MARC (MTA) lines, and Amtrak's Northeast Regional and Vermonter.
User avatar
realtype
 
Posts: 1498
Joined: Tue Oct 17, 2006 9:01 pm
Location: Germantown, MD

Re: MTA Purple Line Bethesda - New Carrollton Light Rail

Postby Jeff Smith » Mon Jul 18, 2016 4:53 pm

Great synopsis, thanks!
Next stop, Willoughby
~Jeff Smith (fka "Sarge") :: RAILROAD.NET Site Administrator
Jeff Smith
Site Admin
 
Posts: 7443
Joined: Tue Nov 07, 2006 9:28 am
Location: MP 67.2 Georgia Southern Railway

Re: MTA Purple Line Bethesda - New Carrollton Light Rail

Postby STrRedWolf » Mon Jul 18, 2016 7:21 pm

It's MTA Maryland, not WMATA. It's a Public/Private Partnership, and I forget who will run the line (probably the private company).

http://www.purplelinemd.com/en/ for more info.
I ride the (MTA Maryland) Penn Line (between Odenton and Baltimore). I used to work for MTA Maryland's IT department, and out of professional courtesy my responses may be limited. Wikimapia is wonderful (for track/interlocking locations)!
User avatar
STrRedWolf
 
Posts: 674
Joined: Sat Oct 24, 2015 5:18 pm
Location: Baltimore, MD

Re: MTA Purple Line Bethesda - New Carrollton Light Rail

Postby Sand Box John » Mon Jul 18, 2016 9:39 pm

"STrRedWolf"
It's MTA Maryland, . . .


MTA Maryland is redundant as MTA under the Maryland Department of Transportation in long form is the Maryland Transit Administration.

In Maryland the MTA is not to be confused with the MDTA, MDTA is the Maryland Transportation Authority. The MDTA is the agency under the Maryland Department of Transportation that operates and maintains the states toll facilities.
John in the sand box of Maryland's eastern shore.
User avatar
Sand Box John
 
Posts: 2724
Joined: Sun Jan 01, 2006 8:55 pm
Location: Hebron Maryland

Re: MTA Purple Line Bethesda - New Carrollton Light Rail

Postby STrRedWolf » Tue Jul 19, 2016 5:29 am

MTA Maryland is what MDOT designated as the shortened name for Maryland Transit Administration. For the Maryland Transportation Administration (yes, that's the official designation) the shortened name is MdTA (lower case "d"). You will not be surprised how many news agents confuse the two.

I worked there when they switched names, and went from mta.state.md.us to mtamaryland.com to mta.maryland.gov. There are still programs that say "MASS TRANSIT ADMINISTRATION" on the reports they print out (especially payroll!).
I ride the (MTA Maryland) Penn Line (between Odenton and Baltimore). I used to work for MTA Maryland's IT department, and out of professional courtesy my responses may be limited. Wikimapia is wonderful (for track/interlocking locations)!
User avatar
STrRedWolf
 
Posts: 674
Joined: Sat Oct 24, 2015 5:18 pm
Location: Baltimore, MD

PreviousNext

Return to DC - Maryland - Virginia Area Passenger Rail: MTA(MARC), VRE, WMATA(Metro)

Who is online

Users browsing this forum: No registered users and 2 guests