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ACE Considering conversion to DMU for reasons of economics and performance. “ACE hopes to eventually extend services to Sacramento and Merced while replacing the existing diesel locomotive – one locomotive per eight coaches, traveling top speed of 79 mph – to that of the Diesel Multiple Unit. Each DMU train is self propelled with top speeds between 110 to 125 mph and performance not affected by train length.”
kaitoku wrote:From the Transportation Research Board subcommittee meeting agenda:ACE Considering conversion to DMU for reasons of economics and performance. “ACE hopes to eventually extend services to Sacramento and Merced while replacing the existing diesel locomotive – one locomotive per eight coaches, traveling top speed of 79 mph – to that of the Diesel Multiple Unit. Each DMU train is self propelled with top speeds between 110 to 125 mph and performance not affected by train length.”
http://trbsprc.blogspot.com/2013/12/201 ... genda.html
Backshophoss wrote:ACE tends to run 7-8 car consists from Stockton to San Jose,on a regular basis,but believe UP will never allow DMU's
to run the Tracy - Newark corridor via Niles Jct, it's UP's south east access to SFO metro area.
Tadman wrote:This is interesting, but there are two important issues: 1. the FRA-compliant DMU marketplace is pretty quiet. We'll see how Sumitomo fares (they have a good track record) in Toronto and Marin County; 2. NJT released a study a few years back that put 7 cars as the over/under for MU efficiency. In other words, trains 8+ cars are optimal as diesel hauled, while 7 and less are optimal as MU's. Obviously they have a far different physical plant and density pattern (as well as electric MU's) so perhaps the math is much different at NJT than ACE. Also, I somewhat question that math when I see endless 10-12 car EMU consists at LIRR, NJT, and MNCR...
Patrick Boylan wrote:If the FRA approves them what reasons would there be for UP not to allow them? How much do regulations allow the host railroad to add extra conditions beyond what the government requires already?
jb9152 wrote:Patrick Boylan wrote:If the FRA approves them what reasons would there be for UP not to allow them? How much do regulations allow the host railroad to add extra conditions beyond what the government requires already?
Well, they own the facility, so everything is subject to negotiation. Regulatory requirements are the base; host railroads often ask for more than the base. If the host railroad doesn't want DMUs, they can kill the deal if the passenger agency pushes too hard.
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