Esri Complete Street Rule Discussion-Feedback?
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A note on ContraFlow Lanes.
Contra-Flow lanes are popular for one way streets for preferential lanes on one-streets that allow transit or bicyclists to travel in the opposite travel direction. From Wikipedia: "Contraflow lanes are often used for bicycles or bus rapid transit on what are otherwise one-way streets. In a sample configuration for buses, a street might have four lanes: the outermost lanes are reserved for buses in both directions, while the center two lanes are available for general traffic in only one direction. Thus, the street functions as two-way for buses, but one-way for all other vehicles."
I wanted to share a quick how to about how to make these types of retrofits to one-way streets (I am trying to be as creative as everyone else here!). The trick is to utilize a near 1 to 0 lane distribution to keep the center line that separates the contraflow lanes from the rest of one way traffic. Please see the image below for the details.
Kind regards,
David
Hi there David,
I've noticed some strange behavior when working with slip lanes. Might be the me that's causing this, or the rule file, so I'd thought Id ask.
To begin with I started with a standard intersection and simply changed from RHD to LHD, no issues there.
With the introduction of slip lanes ( the extra graph lines @ 45 degrees and extra nodes whose types become Freeway with an arc radius of around 20 meters) I notice a few things (highlighted in red).
1. For LHD the Stop Markings & Crosswalk Markings - the Begin / End get switched so that Markings-Stop_Begin corresponds to Crosswalk-Crosswalk_End & vice versa. Perhaps this is why simply switching from RHD to LHD exhibits the extra markings down traffic from the intersection.
2. For both LHD & RHD changing the standard distance (from 2.4 to 2 and lower) of Begin/End Crosswalk to Stop Bar causes some of the cars at the intersection to flip 180 degrees
3. I can not get cars to generate at all in the freeway zones.
On a side issue, all of my Streetnetworks with these slip lane test (freeway nodes) and this rule file become really sluggish to navigate - tho I'm not sure what the initial condition is yet. After some point, I can click select streets, segments, crossings, sidewalks etc as per usual and the response is instant. However, as soon as I click select any freeway segment the GUI takes at least 5-7 seconds to respond. Deleting the models in these cases doesn't help. What I need to do to get back to normal is select all the objects with the rule file and blank out the rule field.
Anyone else experience this ?
Heya David,
Rule version wise, I think I'm using the older version, doh, the zip date is 20/01/2015 if that helps.
I'll test it with the latest later tonight and report back. I can definitely send you the scene / project as it's simply for testing purposes.
What happens when the segments you are working with are longer?
I did take note of what you said about short segments so I did vary them slightly just to see when things fall apart, my shortest distance is 33m I believe. I did notice a change when one node was moved slightly further out, that however might have been due to one of the Begin_Crosswalk_To_Stop_Bar / End_Crosswalk_To_Stop_Bar distances being too low. I will test again with stock standard settings and report from there.
Yes that lag issue is strange one. I will need to test it again just to make sure my observation about these freeways segments is correct.
12 is hardly what you'd consider a lot of segments for CE which is where I'm already observing these slowdowns. Just need to make sure I can reproduce them.
Just to clarify ...
1. Cars are not facing the right direction sometimes or not appearing on the short segment?
This picture might explain it a bit better
The car facing incorrectly happens when I change either the Begin_Crosswalk_To_Stop_Bar / End_Crosswalk_To_Stop_Bar distance to 2m instead of 2.4. Fixable but a little strange ?
The cars not appearing on any of these freeway segments I have no clue as to why , car density is 150 vehicles/km.
2. Stop bars are giving weird behavior on short segments in the left hand slip lane case?
I might do a short video as it's confusing to explain this further I think. In general, what I find is that essentially the segment seems to be flipped so that a stop markings end corresponds to crosswalk begin. Essentially you'd need to hand adjust each such intersection, where as the RHD behaves correctly. Make sense ?
