Adding turn restrictions in Canada using Mapillary

[poornibadrinath]

Goal

• Mapping turn-restrictions in top 5 Canadian cities using Mapillary as the source
• Cities: Ottawa, Toronto, Montréal, Vancouver, Calgary

Task Workflow

1. Using the OSM navigation map
2. Mapping turn restrictions from Mapillary
3. Progress spreadsheet

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Team : @mapbox/team-data

Timeline : 1 week (Estimate)

Tagging guidelines

• Absolute turn restrictions
• Conditional turn restrictions

Data sources

• Mapillary detected traffic signs via OSM navigation map and JOSM plugin
• Bing/Mapbox satellite imagery for cross verification of photograph location/bearing and turn lane markings

Process

• Two mappers can work on one city together and update the spreadsheet with their names, start and end time
• Divide the city into half based on a road/landmark and work at different parts of the city to avoid conflict
• The number of already mapped turn restrictions is given in the spreadsheet. Use the Overpass queries given in the spreadsheet to get the edit count after a city is completed

JOSM Setup

• Plugins:
  • Mapillary plugin
  • Turn-Restriction plugin
• Paint Styles
  • Traffic Signs : JOSM Preferences -> Map Settings -> traffic signs

Changeset Comment:
Updating turn restrictions in CITYNAME using Mapillary imagery https://github.com/mapbox/mapping/issues/213

Source: Bing/Mapillary

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Daily Stats:

Date	City	Reviewed	Before	After	Added Turn Restrictions*
21 July 2016	Ottawa	111	450	476	26
25 July 2016	Ottawa	229	476	489	13
	Toronto		1129	1140	11
	Vancouver		441	471	30
	Montreal		372	385	13
	Calgary		64	73	9
26 July 2016	Ottawa	138	489	503	14
	Toronto		1140	1148	8
	Vancouver		471	477	6
	Montreal		385	409	24
27 July 2016	Ottawa	118	503	521	18
	Toronto		1148	1160	12
	Vancouver		477	488	11
	Montreal		409	424	15
28 July 2016	Ottawa	166	521	548	17
	Toronto		1160	1166	6
	Vancouver		488	488	0
	Montreal		424	428	4
01 August 2016	Ottawa	230	548	571	23
	Toronto		1166	1206	40
	Vancouver		488	510	22
	Montreal		428	430	2
02 August 2016	Ottawa	348	571	616	45
	Toronto		1206	1222	16
	Vancouver		510	557	47
03 August 2016	Ottawa	262	616	642	26
	Toronto		1222	1247	25
	Vancouver		557	561	4
04 August 2016	Toronto	393	1247	1293	46
05 August 2016	Toronto	393	1293	1332	49
				Total	582 *

• Note: The number of added turn turn restrictions includes modified(all versions) turn restrictions as well along with the newly mapped.

[geohacker]

🚗 🍁

[krishnanammala]

I came across this issue where the mapillary signage showing no_u_turn and it should be added via way instead of node. For this cases we should work in JOSM to add this kind of restrictions. It would be nice to have this feature in iD as well.

cc @planemad @bhousel

[planemad]

Came across this sign which I interpreted as no left turn on red or no free left. This is not a turn restriction. Mark as invalid.

[poornibadrinath]

Mapillary has an efficient tool in iD that displays the restriction detected.

It will help in filtering out the mapillary image with the restriction in iD editor and also know which restriction has been detected.

Here's how activate the tool:

[bhousel]

For this cases we should work in JOSM to add this kind of restrictions. It would be nice to have this feature in iD as well.

Yes, having turn restrictions via way in iD would be really useful.. We have an issue for it:
openstreetmap/iD#2346

[manoharuss]

Trial run for Ottawa using iD

Summary

• Reviewers: 4 (@poornibadrinath @maanyaumashaanker @krishnanammala @manoharuss)
• Mapillary restrictions reviewed: 111
• Missing turn restrictions added: 26
• Time: 3 hours

What worked well

• Good Mapillary coverage for Ottawa. Most detected restrictions were already on OSM.
• Mapillary data layer in iD is very helpful to identify restrictions detected in specific mapillary images.

Pain points

• iD editor does not support adding no_u_turn restriction via way instead of node. Need to use JOSM for this.
• Adding conditional restrictions in iD requires editing the tags manually, just like JOSM.
• It is not possible to see the capture date of the mapillary image in both the Navigation map and iD editor in cases when more than one mapillary path exist on the road. JOSM conquers here.
• Mapping in iD editor along with the Navigation map requires switching between 3 tabs to map, 2 tabs to see the full image to orient to the location, where as with JOSM it is all baked in when opened from the Navigation map.

Other observations

• Sudden increase in detected restrictions in the evening corresponding with new Mapillary website launch.

cc @planemad @maning

[ramyaragupathy]

Since mapillary turn restrictions layer is not loading/taking a long time to load in my browser, I'm sticking to iD editor to find out mapillary turn restrictions. Also while doing this, I'm using the gpx of the boundary file so that I don't get lost outside the city boundary.

[srividyacb]

Conditional turn-restriction written in French:
These board means Monday-Friday. Source for translation in case anyone sees any other days of the week written in French.

[srividyacb]

Instructions in french above the turn-restriction sign: 💭

[srividyacb]

What are the usual instructions below turn-restrictions like these? The maximum words we can predict on the board is Except Vehicles ?

"Attendre la flèche pour virer à gauche" is not a turn restriction. It warns drivers who turn left to wait for their light with an arrow to appear green
The "Excepté véhicules autorisés" sign means the u-turn restriction doesn't apply to explicitly authorized vehicules.

[scruss]

You've got that Quebec is all no right turn on red, yes?

Québec is NOT all no right turn on red. Only Montréal island is.