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GIScience
Foot-walking profile (preference shortest) does not correctly avoid ways tagged with highway trunk
Here's what I did
Using the API playground:
POST: https://api.openrouteservice.org/v2/directions/foot-walking/geojson
With the following json payload:
{"coordinates":[[-83.033492,42.312440],[-83.039040,42.317549]],"preference":"shortest"}
Here's what I got
Json payload
{
"type": "FeatureCollection",
"features": [
{
"bbox": [
-83.039061,
42.312439,
-83.033485,
42.317541
],
"type": "Feature",
"properties": {
"segments": [
{
"distance": 838.8,
"duration": 603.9,
"steps": [
{
"distance": 1.6,
"duration": 1.2,
"type": 11,
"instruction": "Head northeast on Elliott Street East",
"name": "Elliott Street East",
"way_points": [
0,
1
]
},
{
"distance": 285.7,
"duration": 205.7,
"type": 0,
"instruction": "Turn left onto Goyeau Street",
"name": "Goyeau Street",
"way_points": [
1,
7
]
},
{
"distance": 142,
"duration": 102.2,
"type": 12,
"instruction": "Keep left",
"name": "-",
"way_points": [
7,
17
]
},
{
"distance": 46.5,
"duration": 33.5,
"type": 13,
"instruction": "Keep right",
"name": "-",
"way_points": [
17,
19
]
},
{
"distance": 160.2,
"duration": 115.4,
"type": 2,
"instruction": "Turn sharp left onto Detroit-Windsor Tunnel",
"name": "Detroit-Windsor Tunnel",
"way_points": [
19,
33
]
},
{
"distance": 64,
"duration": 46.1,
"type": 0,
"instruction": "Turn left onto Park Street East",
"name": "Park Street East",
"way_points": [
33,
35
]
},
{
"distance": 138.9,
"duration": 100,
"type": 1,
"instruction": "Turn right onto Ouellette Avenue",
"name": "Ouellette Avenue",
"way_points": [
35,
36
]
},
{
"distance": 0,
"duration": 0,
"type": 10,
"instruction": "Arrive at Ouellette Avenue, on the right",
"name": "-",
"way_points": [
36,
36
]
}
]
}
],
"summary": {
"distance": 838.8,
"duration": 603.9
},
"way_points": [
0,
36
]
},
"geometry": {
"coordinates": [
[
-83.033491,
42.312439
],
[
-83.033485,
42.312441
],
[
-83.033747,
42.312849
],
[
-83.034205,
42.313561
],
[
-83.034446,
42.313946
],
[
-83.034481,
42.314002
],
[
-83.034713,
42.314374
],
[
-83.034962,
42.314766
],
[
-83.035184,
42.314873
],
[
-83.035266,
42.315019
],
[
-83.035378,
42.315084
],
[
-83.035617,
42.315109
],
[
-83.035683,
42.315113
],
[
-83.035749,
42.315117
],
[
-83.035922,
42.315129
],
[
-83.03617,
42.315168
],
[
-83.036294,
42.315222
],
[
-83.03642,
42.315296
],
[
-83.036588,
42.315494
],
[
-83.036696,
42.31566
],
[
-83.036695,
42.315645
],
[
-83.036726,
42.315575
],
[
-83.036823,
42.315524
],
[
-83.036923,
42.315527
],
[
-83.037015,
42.315583
],
[
-83.037153,
42.315795
],
[
-83.037178,
42.315834
],
[
-83.037212,
42.315886
],
[
-83.037232,
42.315918
],
[
-83.037404,
42.31628
],
[
-83.037429,
42.316326
],
[
-83.037492,
42.316435
],
[
-83.037521,
42.31648
],
[
-83.037588,
42.316593
],
[
-83.037784,
42.316546
],
[
-83.038329,
42.316416
],
[
-83.039061,
42.317541
]
],
"type": "LineString"
}
}
],
"bbox": [
-83.039061,
42.312439,
-83.033485,
42.317541
],
"metadata": {
"attribution": "openrouteservice.org | OpenStreetMap contributors",
"service": "routing",
"timestamp": 1662564583676,
"query": {
"coordinates": [
[
-83.033492,
42.31244
],
[
-83.03904,
42.317549
]
],
"profile": "foot-walking",
"preference": "shortest",
"format": "geojson"
},
"engine": {
"version": "6.7.0",
"build_date": "2022-02-18T19:37:41Z",
"graph_date": "2022-08-30T10:07:49Z"
}
}
}
Here's what I was expecting
I was expecting the foot-walking profile while using the shortest preference to still avoid ways that aren't accessible to foot traffic. The issue with the directions returned is that those ways tagged with name=Detroit-Windsor Tunnel don't have sidewalks and therefore shouldn't be considered. Basically, I expected this line for the FootFlagEncoder object to always be enforced regardless of the preference used. As a side note, I understand that this is a bit of an edge case since this area is strictly off limits to foot traffic as it's a car traffic border crossing between Canada and the USA. Maybe the underlying OSM should contain additional tags noting that this area is off limits to food traffic.
However, I still would expect a way tagged with highway=trunk and that doesn't have a tag for sidewalks to be avoided.
Here's a screen shot of the tags for one of the ways used in the route.
Here's what I think could be improved
The foot-walking profile while using the preference shortest should always avoid ways with the highway tag values trunk, trunk_link, primary, primary_link unless they are also tagged with a sidewalk.
