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View Full Version : Glebe Rd (Alexandria) Bike Lanes



Fairlington124
04-01-2016, 10:41 AM
Alexandria's government webpage underwent a redesign. In addition, it looks like some new content was added to the LocalMotion site.

https://www.alexandriava.gov/LocalMotion/info/default.aspx?id=11092

Namely, the "Glebe Road Bicycle Lanes" and "Kenwood Avenue Bicycle Lanes" projects caught my eye. They do not link to anything, but thinking speculatively, I presume Kenwood bike lanes would run from King all the way up to either Fern or Crestwood. They would almost certainly connect to the King Street facility after the Complete Streets program is enacted on King.

The Glebe Road bike lanes hold more possibilities, because you could be talking about from Valley to Commonwealth, Commonwealth to Potomac Yard, or both, or a fraction of any of those. Would be a nice alternative to the FMR trail.

Inquired with City and got this response:


We are working to get a Glebe Road website up. Right now, we just have an EB climbing lane between Commonwealth and Rt 1.

DismalScientist
04-01-2016, 10:46 AM
Isn't Glebe perfectly flat between Commonwealth and Rt 1? If anything, EB is downhill.

Sunyata
04-01-2016, 11:54 AM
Isn't Glebe perfectly flat between Commonwealth and Rt 1? If anything, EB is downhill.

There is a very slight rise before it turns downhill. But... I do not recall ever seeing a bike lane. Are they saying that is the only thing they have planned or the only thing they currently have (which, I am pretty sure is not there...)?

lordofthemark
04-01-2016, 12:03 PM
There is a very slight rise before it turns downhill. But... I do not recall ever seeing a bike lane. Are they saying that is the only thing they have planned or the only thing they currently have (which, I am pretty sure is not there...)?

Sounds like the former. IE "the only thing we have in the plans, to put on the website"

scoot
04-01-2016, 02:14 PM
Isn't Glebe perfectly flat between Commonwealth and Rt 1? If anything, EB is downhill.

I would have thought so too, but Google Earth shows Glebe's elevation ASL at Commonwealth = 14 feet and Rt 1 = 37 feet.

It looks like the road is only about 32 feet wide gutter to gutter. Unless the parking lane is removed, any bike lane is doomed to end up in the DZ, no?

KWL
04-01-2016, 06:53 PM
I would have thought so too, but Google Earth shows Glebe's elevation ASL at Commonwealth = 14 feet and Rt 1 = 37 feet.

It looks like the road is only about 32 feet wide gutter to gutter. Unless the parking lane is removed, any bike lane is doomed to end up in the DZ, no?And to terminate at one of the worst intersections in Alexandria - Rt 1 & East Glebe. That express bus lane really did a number on the left turns there. creating all sorts of confusion that is not good for anyone cycling through that intersection.

creadinger
04-05-2016, 11:45 AM
I would have thought so too, but Google Earth shows Glebe's elevation ASL at Commonwealth = 14 feet and Rt 1 = 37 feet.

It looks like the road is only about 32 feet wide gutter to gutter. Unless the parking lane is removed, any bike lane is doomed to end up in the DZ, no?

It's definitely not flat. While it's not a "hill", it rises enough that it would slow most cyclists down a bit. And it's not a bad idea adding an E-W lane in that area seeing how Reed street is now a hellhole, and everything south of there are neighborhood streets with only Custis and Monroe actually crossing Rt 1.

What are they going to do with that "traffic calming" pedestrian island which separates and narrows each lane at Montrose? I hate those things. They may be good for pedestrians, but I don't like being forced into a narrow traffic lane like that. It's an unofficial merge, and you know how much people like merging in general... ugh.

lordofthemark
04-05-2016, 05:14 PM
I rode it this past weekend - the rise was enough to slow me (and I imagine many less strong cyclists, folks on CaBi bikes or on the undersized mountain bikes often ridden by poorer Alexandrians, etc) - that combined with it being residential so not a lot of parking turnover, makes me think this is not a bad candidate for a doorzone bike lane (I am sure the parking will stay - A. If parking was being taken out, there would be a lot more outreach, preparatory to going before the TPB) B. Taking out the parking would mean either very wide bike lanes, or adding to the general travel lanes, which would defeat traffic calming, which is likely the City's principle motive for change here.

As for the intersection, I don't think either going straight through, or turning right, will he hard with a bike lane, as they are not hard now. Making a vehicular left will be difficult, but it looked like no fun now.

scoot
04-05-2016, 05:30 PM
this is not a bad candidate for a doorzone bike lane (I am sure the parking will stay

Is there such a thing as a good doorzone bike lane? If there isn't enough space to get the bike lane out of the DZ, shouldn't this street get sharrows instead?

lordofthemark
04-05-2016, 07:31 PM
Is there such a thing as a good doorzone bike lane? If there isn't enough space to get the bike lane out of the DZ, shouldn't this street get sharrows instead?

A sharrows does not narrow the general travel lane, hence does little for traffic calming. Which is of benefit to pedestrians, many drivers, and yes, some cyclists.

In addition many cyclists are more comfortable in a door zone bike lane than a sharrows. I'd rather not get into the theological debate on that. I would love to see a study on relative safety that managed to adjust for both cyclist speed on a climbing lane, and for parking turnover rates.

scoot
04-05-2016, 11:47 PM
I would love to see a study on relative safety that managed to adjust for both cyclist speed on a climbing lane, and for parking turnover rates.

It seems obvious that there are some situations where bicycles are safer sharing space with motor vehicles and that there are other situations where mode separation is safer. The challenge is identification and characterization of the features that define the boundary between these two cases. Examples of factors likely to contribute: relative speed, average amount of bicycle and motor traffic, average parking turnover, time of day, sightlines, mean vehicle distances between turns on/off the road, etc. Not possible to sufficiently control any existing data set, I suspect. A machine learning approach, with data from many different locations, might be able to make a rough estimate of the boundary for a rule of thumb.

creadinger
04-06-2016, 10:55 AM
I have to assume this is already on some list of improvements, but one thing I need to see ASAP is repaving Commonwealth north of Reed St. I'm assuming they'll do it once they're done upgrading whatever facilities are down there, but that road is terrible now! A bike lane on Glebe doesn't seem totally necessary to me.

peterw_diy
04-06-2016, 02:16 PM
I have to assume this is already on some list of improvements, but one thing I need to see ASAP is repaving Commonwealth north of Reed St. I'm assuming they'll do it once they're done upgrading whatever facilities are down there, but that road is terrible now!

Not on the list through June 2018 - https://www.alexandriava.gov/PublicWorks#FY2016PavingProgram

creadinger
04-06-2016, 02:31 PM
Not on the list through June 2018 - https://www.alexandriava.gov/PublicWorks#FY2016PavingProgram

Thanks for the link. The "good" news is that my street is on the list to get re-paved next year I guess... so that's something. Parts of it will be just gravel by then, but oh well. Same with Commonwealth north of Reed.

CaseyKane50
05-09-2016, 05:21 PM
Inquired with City and got this response:


We are working to get a Glebe Road website up.

The website (https://www.alexandriava.gov/localmotion/info/default.aspx?id=91678) is now available. Along with the climbing lanes in the eastbound direction, the project will add a bike box on Commonwealth in the southbound direction.

11732

lordofthemark
05-09-2016, 07:31 PM
And as was speculated above, the principal motive for the bike lane is to narrow the general travel lanes for traffic calming purposes, and parking will remain.

lordofthemark
07-18-2016, 01:28 PM
Rode this yesterday. As DZ bike lanes go, it was not the worst I have been in, nor was it the best. At least yesterday afternoon when I rode there was no parking turnover, but OTOH there was also hardly any traffic in the general travel lane. The climb is enough for me to go noticeably slower than I do on a flat. The sharrows are painted on the downhill side, for you sharrows fans. It occurred to me that it would be better to have kept the parking on the north side instead of the south side, and so have the bike lane be adjacent to the curb, thus not in a DZ. I assume they did not do that because A. The demand for parking is greater on the south side, more driveways on the north side, etc B. Because since you cannot include gutter space in the bike lane, but you can included it in the parking zone, it saves road space the way they have configured it.

GovernorSilver
07-18-2016, 01:52 PM
We rode on Commonwealth this past Friday evening. Looks like new asphalt was installed on the circle next to Four Mile Run Park Trail.

Arlingtonrider
07-18-2016, 03:23 PM
I really wish a bike lane could be added to South Glebe between Mt. Vernon Avenue and Route 1 - especially before the planned year-long closure of the adjacent part of Four Mile Run Trail. No such plan is in the works, though, as far as I know.

lordofthemark
07-18-2016, 03:29 PM
I really wish a bike lane could be added to South Glebe between Mt. Vernon Avenue and Route 1 - especially before the planned year-long closure of the adjacent part of Four Mile Run Trail. No such plan is in the works, though, as far as I know.


Last I heard, at a BPAC meeting a few months ago, the planned closure is now expected to be only a few months. I think I heard that right. I am planning to go to tonight's meeting (after missing a couple) so if there is a mention, I will report back here.

lordofthemark
07-18-2016, 09:11 PM
Oops, my mistake. Tonight I heard they still expect it to take the better part of a year. But that was from City staff (in the context of some improvements on the City side )maybe better if someone from Arlington could update.

chris_s
07-19-2016, 09:31 AM
Oops, my mistake. Tonight I heard they still expect it to take the better part of a year. But that was from City staff (in the context of some improvements on the City side )maybe better if someone from Arlington could update.

Mt Vernon Ave >> Eads is going to be closed for about a year.
Eads >> Route 1 for about 3 months.

Detour (https://arlingtonva.s3.amazonaws.com/wp-content/uploads/sites/31/2016/06/DES_FourMileRunTrail_Detour_TwoRoutesOption.pdf)

GovernorSilver
07-19-2016, 05:51 PM
We rode on Commonwealth this past Friday evening. Looks like new asphalt was installed on the circle next to Four Mile Run Park Trail.

I was wrong. Rode through the circle again yesterday evening. Road looked as beat up as ever.

I must have been hallucinating from heat exhaustion or something Friday evening.

Bummed that the sweet Eads -> 4 Mile Run Trail -> Shirlington route will be going away for a year in the near future.