archBOSTON.org

Go Back   archBOSTON.org > Boston's Built Environment > Transit and Infrastructure

Transit and Infrastructure All things T or civilly engineered within Boston Metro.

Reply
 
Thread Tools Search this Thread
Old 06-07-2018, 02:06 PM   #381
sm89
Senior Member
 
Join Date: Apr 2014
Location: Somerville
Posts: 755
Re: Longfellow Bridge update

Quote:
Originally Posted by CSTH View Post
...safe to assume he's talking about Charles St. ...
my bad. fixed.
sm89 is offline   Reply With Quote
Old 06-07-2018, 03:57 PM   #382
cden4
Senior Member
 
Join Date: Sep 2007
Posts: 1,044
Re: Longfellow Bridge update

Correct. The outbound bike lane and sidewalk are both wider than on the inbound side because of MassDOT's willingness to provide one rather than two outbound travel lanes. Advocates preferred and advocated for a similar configuration on the inbound side as well, but MassDOT was concerned about queuing during peak hour. (Which is too bad, because that extra inbound travel lane isn't really needed at all for about 22 hours out of the day.)
cden4 is offline   Reply With Quote
Old 06-08-2018, 12:08 AM   #383
Joel N. Weber II
Senior Member
 
Join Date: Aug 2015
Posts: 577
Re: Longfellow Bridge update

My recollection is that it wasn't just about queueing, that it was also about letting Mem Drive traffic onto the bridge without having to yield to traffic from Main St, except of course that somehow the Mem Drive cars need to not collide with the bikes...

At Charles Circle, we do get more throughput for a given limited amount of green time by having the multiple lanes, and the bridge was widened during the reconstruction, in spite of historic accuracy concerns, to make space for three lanes. However, that three lane segment only needs to be long enough to store the number of cars that can get through the light during a single green phase, and if the road narrows to one lane west of that, that shouldn't reduce throughput at Charles Circle at all.

https://twitter.com/Felicity_Lingle/...66274773569538 indicates that slightly more than 1/3 of the inbound traffic on the bridge was cyclists at one point, and I think that probably argues that allocating one of the three lanes to bicycles would be appropriate.

Do we have any photographic documentation of how far back the stopped car queue on the two lane segment of the bridge goes at its peak? Can we estimate how much farther it would go if it were narrowed to a one lane queue?

For traffic from Storrow Drive to the Longfellow bridge, building a new off ramp north of the Red Line that would loop through the parking lot to get that traffic to go through less of the signalized intersection might also help.
Joel N. Weber II is offline   Reply With Quote
Old 06-09-2018, 09:42 AM   #384
sm89
Senior Member
 
Join Date: Apr 2014
Location: Somerville
Posts: 755
Re: Longfellow Bridge update

Quote:
Originally Posted by Joel N. Weber II View Post
https://twitter.com/Felicity_Lingle/...66274773569538 indicates that slightly more than 1/3 of the inbound traffic on the bridge was cyclists at one point, and I think that probably argues that allocating one of the three lanes to bicycles would be appropriate.
There is a bike counter on Broadway in front of the Marriott. This is anecdotal, but I travel through here almost daily and the daily totals shot up from around 1500 cyclists per day to 2000 cyclists per day right after the bridge fully reopened. Pretty impressive.

https://goo.gl/maps/xGf9JA92BSF2
sm89 is offline   Reply With Quote
Old 06-11-2018, 10:42 AM   #385
34f34f
Senior Member
 
Join Date: Oct 2015
Posts: 143
Re: Longfellow Bridge update

Quote:
Originally Posted by sm89 View Post
There is a bike counter on Broadway in front of the Marriott. This is anecdotal, but I travel through here almost daily and the daily totals shot up from around 1500 cyclists per day to 2000 cyclists per day right after the bridge fully reopened. Pretty impressive.

https://goo.gl/maps/xGf9JA92BSF2
Nice! Though totals for the bridge will be slightly different—some of those bikes may be going to 3rd Street, while others that cross the bridge may be coming from Main St or Mem Drive. But I have no doubt the finished product is encouraging even more people to ride bikes across the bridge.

------------

Quasi-relatedly, they put a speed sign (25 mph limit) on the bridge. Anecdotally, almost every vehicle driver starts in the high 30s, drops down to 30, then speeds up again after they're out of range.

I think this will be very useful information supporting the claim that current road design encourages speeding, hopefully encouraging MassDOT to actually follow through with their expanded bike lane pilot that they've said they'll do. (Reduce the uphill portion to one motor vehicle lane, with a corresponding doubling of the bike lane through that portion which also doubles as an emergency responder lane.)
34f34f is offline   Reply With Quote
Old 06-12-2018, 07:17 PM   #386
Joel N. Weber II
Senior Member
 
Join Date: Aug 2015
Posts: 577
Re: Longfellow Bridge update

I certainly think that traffic regularly exceeding the posted speed limit justifies making traffic calming changes, and I certainly think that proposing solutions that also improve biking is great, and while I certainly prefer to end up with a fix that gives more space to bikes, in theory if we were focused just on traffic calming it might be possible to find a solution that wouldn't improve biking.

Do we have data on how speeds compare for the single automobile lane heading towards Cambridge vs the two lanes heading towards Boston? I'm under the impression that they were planning to have 11' lanes, and if that's the case it would be good to know whether the 11' lane to Cambridge has lead to appropriate speeds or whether narrowing to 10' would be better.

https://twitter.com/MattyCiii/status...04769933008896 claims 53 MPH has been observed.
Joel N. Weber II is offline   Reply With Quote
Old 07-17-2018, 01:08 PM   #387
stevebikes
Senior Member
 
Join Date: May 2013
Posts: 174
Re: Longfellow Bridge update

I don't see a separate thread for the pedestrian bridge but it looks pretty close to done:



























stevebikes is offline   Reply With Quote
Old 07-17-2018, 03:05 PM   #388
CSTH
Senior Member
 
Join Date: Oct 2009
Posts: 1,613
Re: Longfellow Bridge update

Niiice
CSTH is offline   Reply With Quote
Old 07-22-2018, 03:43 PM   #389
bweiss
Junior Member
 
Join Date: Feb 2007
Posts: 25
Re: Longfellow Bridge update

Does anyone on the forum know why there is still a northbound speed restriction for the Red Line, just as it leaves Charles Street? It lasts almost until the crest of the bridge, but it isn't matched by one on the southbound side. Are they still doing work underneath?
bweiss is offline   Reply With Quote
Old 08-06-2018, 11:16 PM   #390
BeeLine
Senior Member
 
Join Date: Jan 2012
Posts: 8,399
Re: Longfellow Bridge update

BeeLine is offline   Reply With Quote
Old 08-07-2018, 10:13 AM   #391
jass
Senior Member
 
Join Date: Jul 2006
Posts: 4,075
Re: Longfellow Bridge update

Odd to me that after spending so much money, the bike lane looks like a temp retrofit.
jass is offline   Reply With Quote
Old 08-07-2018, 10:41 AM   #392
CSTH
Senior Member
 
Join Date: Oct 2009
Posts: 1,613
Re: Longfellow Bridge update

Well ... in a sense a lot of boston bike lanes are seasonal, and do snow-storage duty in the winter. So in that sense yeah, its temporary...
CSTH is offline   Reply With Quote
Old 08-07-2018, 12:24 PM   #393
HenryAlan
Senior Member
 
Join Date: Dec 2009
Location: Rozzie Square
Posts: 1,756
Re: Longfellow Bridge update

Quote:
Originally Posted by jass View Post
Odd to me that after spending so much money, the bike lane looks like a temp retrofit.
That was exactly my thought -- how hard would it have been to put in a separation barrier that fit the architecture of the bridge?
HenryAlan is offline   Reply With Quote
Old 08-07-2018, 01:57 PM   #394
greenlinetobrooklyn
Junior Member
 
Join Date: Apr 2009
Location: Somerville
Posts: 10
Re: Longfellow Bridge update

Quote:
Originally Posted by HenryAlan View Post
That was exactly my thought -- how hard would it have been to put in a separation barrier that fit the architecture of the bridge?
In my opinion, it's a tragedy that an appropriate bike lane wasn't included in the original plans.
greenlinetobrooklyn is offline   Reply With Quote
Old 08-07-2018, 03:08 PM   #395
Suffolk 83
Senior Member
 
Join Date: Nov 2007
Location: South End
Posts: 1,947
Re: Longfellow Bridge update

Ive rode my bike on it, seems fine to me. Its not as aggressive a bike lane as say the Commercial st cycle track but it doesnt bother me
Suffolk 83 is offline   Reply With Quote
Old 08-07-2018, 03:57 PM   #396
jass
Senior Member
 
Join Date: Jul 2006
Posts: 4,075
Re: Longfellow Bridge update

Quote:
Originally Posted by Suffolk 83 View Post
Ive rode my bike on it, seems fine to me. Its not as aggressive a bike lane as say the Commercial st cycle track but it doesnt bother me
Referring to all the talk about refurbishing the metal work, using the original stone, including the historic light structures and the fence and yada yada

And here are some $10 plastic poles from the Home Depot.
jass is offline   Reply With Quote
Old 08-07-2018, 04:43 PM   #397
cden4
Senior Member
 
Join Date: Sep 2007
Posts: 1,044
Re: Longfellow Bridge update

It is a retrofit. The original plans for the Longfellow simply had a striped bike lane with no physical separation. Only in the last year or so did MassDOT rethink those plans (after many years of advocates pressing them to.)
cden4 is offline   Reply With Quote
Old 08-09-2018, 08:43 AM   #398
JeffDowntown
Senior Member
 
Join Date: May 2007
Location: South Cove
Posts: 2,594
Re: Longfellow Bridge update

Quote:
Originally Posted by jass View Post
Referring to all the talk about refurbishing the metal work, using the original stone, including the historic light structures and the fence and yada yada

And here are some $10 plastic poles from the Home Depot.
Relatively inexpensive, and removable, replaceable for winter snow plowing, AKA practical.
__________________
Jeff H.
Downtown, South Cove
JeffDowntown is offline   Reply With Quote
Old 08-09-2018, 08:48 AM   #399
statler
Moderator
 
statler's Avatar
 
Join Date: May 2006
Location: Approaching a City
Posts: 7,512
Re: Longfellow Bridge update

True, but they were practical about literally nothing else on this project, so it sort of sticks out.
statler is offline   Reply With Quote
Old 08-09-2018, 12:38 PM   #400
sm89
Senior Member
 
Join Date: Apr 2014
Location: Somerville
Posts: 755
Re: Longfellow Bridge update

Quote:
Originally Posted by cden4 View Post
It is a retrofit. The original plans for the Longfellow simply had a striped bike lane with no physical separation. Only in the last year or so did MassDOT rethink those plans (after many years of advocates pressing them to.)
More robust facilities are a "new" thing here. They are finally catching on, but unfortunately we'll need to wait a little for the longer term projects that were designed years ago to finish before we start seeing quality designs from the get-go.
sm89 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Burlington Update.... SHAZBAT73 Greater New England 14 09-09-2016 06:05 PM
The Zakim Bridge KentXie Transit and Infrastructure 14 04-14-2009 11:44 PM
Waterworks at chestnut hill update. palindrome Development Projects 4 07-26-2006 02:36 PM


All times are GMT -5. The time now is 07:25 AM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.