I’ve come across three different ways the RCUT/J Turn intersection has been handled in the small area I work in. Looking at At-grade connectors wiki https://wiki.waze.com/wiki/At-grade_connectors it has a message saying the exception section is under revision. So I’m looking for guidance on what the best practice is at this time.
Here is one sample with the left turns as un-named streets and right turns allowed on the left turn lane.
https://www.waze.com/editor/?env=usa&lon=-92.70903&lat=38.03611&layers=933&zoom=6&mode=0&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0&segments=65160715
Here is another with the left turns as ramps and right turns prohibited on the left turn lane.
https://www.waze.com/editor/?env=usa&lon=-93.11370&lat=37.61116&layers=933&zoom=5&mode=0&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0&segments=83474833
A third as a straight across intersection, this is one I’m looking to fix, but want to do it the right way the first time.
https://www.waze.com/editor/?env=usa&lon=-93.12337&lat=37.59619&layers=933&zoom=5&mode=0&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0&segments=83474833
And where should the Junction Node be placed, I’ve read some discussion in the forums but haven’t found a clear answers. Seems the stated location of at the last legal turning point can cause missed turns due to the lateness of the final notification?
I’m willing to standardize others as I come across them. Also should the turn onto the highway be a separate lane? There is a bit of an island, but there isn’t really an acceleration lane. If it should be there, as a ramp or street?
I also have MUTI intersections on my daily commute that need fixing so any guidance on that would be helpful as well. Here’s one that doesn’t allow any right turn exits, that needs to be fixed. And the north and south exit lanes are different lengths.
https://www.waze.com/editor/?env=usa&lon=-93.13783&lat=37.56968&layers=933&zoom=6&mode=0&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0&segments=81125019
TIA for the help.
The inner turning lanes should be set up as no-name segments and the roadside should match the road type they are connected to. If the road is MH, The inner turning lanes should also be MH. The example where the turning lane was set up as a ramp is incorrect.
Additionally – the right turns from these left turning lanes should be restricted. The departure angle of the segments should be somewhere between 28 and 33° angle. That will force a keep left command and also the angle is sufficient to be visible on the app. I would only use these turning lanes where there is clear separation with a median or non-drivable area between the parent roadway & the turning lane.
Example number three with the straightahead segments at first glance looks like it may be OK leaving it just as it is. The driver will receive a turn left to command and it does not appear that there is sufficient separation to warrant adding those extra turning segments. I’ll preface this conversation that I reviewed this on my iPhone and possibly missed something. Hope that helps !
What is considered sufficient separation? According to Toolbox measurement example 1 segment between the lanes is 97’, example 3 is 92’. Looking at example 3 on a desktop the NB lane at the entrance to the exit lane is showing on the inside shoulder/median which makes it look closer to the SB road than it actually is. It does spread back onto the road surface when it gets to the intersection itself though it is still in the left lane.
Not arguing, just trying to get the best understanding I can before I screw anything up. 
And I will screw something up, if you don’t make mistakes you aren’t trying or learning. You fix them if you can and move on and try not to repeat them.
What I meant by sufficient separation is that the turning lane is separated from the parent roadway by a non drivable median. Now that I’m at my laptop - the third example is sufficiently separated to justify the turning lanes.
1.) Inner turning lanes should be the same road type as the parent roadway. In this case MH.
2.) Right turn from the turning lane segment should be disabled.
3.) Departure Angle for the turning lane should be closer to 30 degree angle from the parent roadway. Angles less than 20 degrees do not show up on the app. We want the turning lane to be visible on the app. This will produce a keep left / turn left TTS.
- No name segment for BC and name inheritance. Lock at the same level as parent roadway.
Should be good to go!
Okay, I think I understand that part. Where should the junction node for the entrance to the turn lane be placed to give drivers appropriate warning to enter the lane safely? I’ve seen them at the beginning of the lane, at the start of the solid white separation line and close to the physical separation of the lane if it parallels for a ways.
Here is the link to the Waze wiki – junction style guide for interchanges. The information for ramps also applies for turning lanes or AGC segments I generally put my junction nodes right where the solid line starts and the dashed line ends for the departing segment. Let me know if you have any questions after reviewing this link.
https://wiki.waze.com/wiki/Junction_Style_Guide/Interchanges