NOTICE: help.openstreetmap.org is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum

Consider https://www.openstreetmap.org/#map=17/42.85888/-73.77169. As I write this, I-87 is annotated as having 3 lanes south of the on/off ramps (south of 146). However, the off ramp starts all the way back at the Sitterly Road overpass, and the on ramp doesn't fully merge until just before the emergency vehicle turn-around only slightly north of said overpass. Accordingly, there are actually four lanes for these stretches.

What is the correct way to model this?

I'm thinking, for the off ramp, the highway:motorway_junction should be pushed back, the relevant segment made 4-lane, and possibly get change:lanes=yes|yes|yes|no; the location where the ramp splits from the freeway should be left as-is (currently where the ramp actually separates from the freeway). For the on ramp, make the relevant segment 4-lane with change:lanes=yes|yes|not_right|yes. Is that the sensible thing to do, or is there another way?

asked 02 Jul '20, 22:38

mwoehlke's gravatar image

mwoehlke
26224
accept rate: 0%


That's not entirely correct in this case. You are allowed to change lanes on merging and diverging lanes as well. They aren't solid white lines. The point of exit indication (highway=motorway_junction) should remain as is.

For clarity, refer to northbound to add a turn:lanes=none|none|none|merge_to_left on southbound.

permanent link

answered 04 Jul '20, 09:44

Kovoschiz's gravatar image

Kovoschiz
2.4k31147
accept rate: 16%

edited 04 Jul '20, 09:47

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×53

question asked: 02 Jul '20, 22:38

question was seen: 1,178 times

last updated: 04 Jul '20, 09:47

NOTICE: help.openstreetmap.org is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum