gokeefe wrote:eastwind wrote:According to New Haven Railroad ETT No. 177 (April 26, 1953):
Maximum speed on the Shore Line between Old Saybrook and Stonington, which included the New London-Groton (1.43 miles) segment, was 70 mph, with speed restrictions on the New London curves and over the bridge.
MAS Groton-Worcester (70.88 miles) was 50 mph, with a speed restriction of 35mph at Shetucket.
Total miles New London-Worcester via Norwich and Putnam: 72.31.
MAS Stonington-Readville, which included the Providence-Boston Switch segment (4.90 miles) was 75 mph. [On today's NEC, it is, for the most part, 125mph.]
MAS Boston Switch-South Worcester (37.47 miles) was 60 mph.
Mileage between Worcester and Providence was 43.29 and between Providence and New London was 62.25. Total miles New London-Worcester via Blackstone, Providence and the Shore Line: 105.54.
Although the route via Norwich was 33.23 miles shorter than the route via Providence, it had a lower Maximum Allowable Speed. The running times Worcester-New London were nearly the same: 1h51m for "Shoreliners" (RDCs) making 6 intermediate stops via Norwich, versus 2h25m for the State of Maine making one intermediate stop of 10m at Providence—thus 2h15m, a difference of only 24m. And remember, we are comparing speedy RDCs on a day run versus a heavy sleeping car train on a night run.
eastwind
Wow. Thanks for another great response.
So, perhaps this begs the question, given today's NEC speeds, which for a train operating to/from Maine would likely be with equipment certified for up to either 110 MPH - 125 MPH what would the transit times look like if they used the Worcester-Providence-Shore Line routing? I'm assuming they would be lower, even when compared against "fastest historical" timetable speeds?
To answer this question, we would need to know a couple of things.
(1) The distance between New London and Worcester via Putnam and the current MAS on that line, and
(2) The current travel time between New London and Providence, plus the distance between Providence and Worcester and the current MAS on that line.
Then, with a couple of calculations, we could come up with a rough estimate of transit times via both routes, and compare them.
We know the distance between Worcester and (1) New London via Putnam (70.88 miles) and (2) Providence (43.29 miles—actually 37.47 miles to Boston Switch in Pawtucket, where the route enters the NEC). These are historical distances; I'm assuming the station relocation in New London did not alter the distance by more than a few hundred feet, which can be ignored for our purposes here.
The historical MAS via route (1) was 50 mph, and via route (2) was 60 mph. They are lower today. But by how much?
(1) I have Richard E. Green's excellent "Connecticut Rail Track Map as of 1/30/11," which, alas, he has withdrawn from the web because he no longer owns the copyright. This map shows the MAS on the P&W between Groton and the Massachusetts border—route (1)—to be generally 40, with a few speed restrictions in the 10-25 mph range. So let's assume for the moment it's 40 for the whole line. Dividing the 70.88 miles by 40 gives an absolute minimum running time of 1h46m. This is unrealistic, given that the New Haven's running time on this line in 1953, with a MAS of 50, was 1h53m.
Let's look at this another way. Dividing 70.88 miles by the 1953 running time of 113 minutes gives an average speed of 37.6. This is 75.3% of the 50mph MAS for the line. Multiplying the current MAS of 40 by 75.3% gives a tentative average speed of 30.11 mph. Dividing the 70.88 miles by this speed gives an approximate running time of 2h21m, plus a few more minutes from Groton to New London. So let's say
2h25m Worcester-New London via Putnam.
(2) Current Amtrak running times for New London-Providence non-Acela trains range between 0h50m for Northeast Regional 166 and 1h26m for Northeast Regional 56, with the median running time right around one hour.
So that leaves the Providence-Worcester segment to be calculated.
Assuming the same current MAS on this P&W line as on the other (I do not have this information; does anyone?), we can divide the 37.47 miles by the previously calculated 30.11 mph tentative average speed to come up with an approximate running time of 1h15m, plus about 7 minutes from Boston Switch to Providence (realistic?). So let's say 1h22m Worcester-Providence, plus 1h00m Providence-New London, for a total Worcester-New London via route (2) of
2h22m.
It's kind of a toss-up. One argument for running via Providence is to connect that city with Worcester, currently not available by rail but in the Rhode Island long-term rail plan, and to connect Maine and New Hampshire with Rhode Island
as well as Connecticut without going through the Boston change-stations dance.
Raising track speeds, should you wish to do so, on the 37.47 miles between Providence (Boston Switch) and Worcester would undoubtedly be less costly than on the 70.88 miles via Putnam. Especially in view of the fact that New Haven's track speeds on those lines was probably the highest physically possible. A higher MAS on a shorter route, even though longer between endpoints, might make the difference in your decision.
eastwind
Formerly of Pittsfield and Waterville (Maine), New York City, Montréal, and San Francisco.