BostonUrbEx wrote:BandA wrote:to travel 1-2 miles
The same disingenuous thing could be said for I-93 in the Tip O'Neil Tunnel. It probably would even have a similar cost when broken out from the rest of the Big Dig. And yet somehow it gets a complete pass and would be unthinkable to not connect a woefully inefficient transportation mode.
This isn't like extending from Lechmere to Union Sq, this is like connecting Copley to Park St.
Exactly. Furthermore, this isn't about connecting commuter lines, it's about giving Boston it's own S-Bahn/RER/Elizabeth Line that can parallel the at-capacity segments of the current subway network and supplement/replace them with high-frequency service on the CR lines. Think: Alewife/Davis/Porter to the Seaport and Longwood via The Link and South Station/Yawkey, or Lowell/Lynn/Salem to Seaport, or Boston Landing/West Station to Sullivan/Assembly, etc, etc, etc. Furthermore, tons of outlying CR stations within 128 sit surrounded by relatively sparse development, and the NSRL with the added frequencies that it will allow due to through-service, will put each and every one of these now-underutilized areas into play as the potential next North Point/Beacon Yards/Assembly Square/Boston Landing/Alewife, especially given Boston's current real estate climate. Even at the inflated $12 billion figure, the NSRL could easily drive two or three times that much in real estate development alone in places like South Quincy/Braintree, Readville, Mishawum, Chelsea/Everett, and Waltham.
rethcir wrote:But yeah, can we achieve the same practical results with SSX, dual modes with electrification inside 128, etc?
All you need to do is look at the number of tracks at Grand Central vs Penn Station then look at the respective daily train/passenger boardings at each and you'll see just how significant of an advantage through-service stations have relative to terminal stations when it comes to train volumes. sS-Bahn frequencies on the inner portions of the CR will be impossible without through-running via the NSRL.