Add support for non-numerical units in car profile for maxheight #4763

CHANGELOG.md

@@ -8,6 +8,7 @@
     - Profile:
       - FIXED: `highway=service` will now be used for restricted access, `access=private` is still disabled for snapping.
       - ADDED #4775: Exposes more information to the turn function, now being able to set turn weights with highway and access information of the turn as well as other roads at the intersection [#4775](https://github.com/Project-OSRM/osrm-backend/issues/4775)
+      - FIXED: #4763: Add support for non-numerical units in car profile for maxheight [#4763](https://github.com/Project-OSRM/osrm-backend/issues/4763)
 
 # 5.15.0
   - Changes from 5.14.3:

features/car/physical_limitation.feature

@@ -39,7 +39,12 @@ Feature: Car - Handle physical limitation
     Scenario: Car - Limited by height
         Then routability should be
             | highway | maxheight:physical | maxheight | bothw |
+            | primary |                    |           | x     |
             | primary | 1                  |           |       |
             | primary | 3                  |           | x     |
             | primary |                    | 1         |       |
             | primary |                    | 3         | x     |
+            | primary |                    | default   | x     |
+            | primary |                    | none      | x     |
+            | primary |                    | no-sign   | x     |
+            | primary |                    | unsigned  | x     |

profiles/lib/measure.lua

@@ -55,12 +55,25 @@ function Measure.parse_value_kilograms(value)
   end
 end
 
+-- default maxheight value defined in https://wiki.openstreetmap.org/wiki/Key:maxheight#Non-numerical_values
+local default_maxheight = 4.5
+-- Available Non numerical values equal to 4.5; below_default and no_indications are not considered
+local height_non_numerical_values = Set { "default", "none", "no-sign", "unsigned" }
+
 --- Get maxheight of specified way in meters. If there are no
 --- max height, then return nil
-function Measure.get_max_height(raw_value)
+function Measure.get_max_height(raw_value,way)
   if raw_value then
+    if height_non_numerical_values[raw_value] then
+      if way then
+        return way:get_location_tag('maxheight') or default_maxheight
+      else
+        return default_maxheight
+      end
+    else
       return Measure.parse_value_meters(raw_value)
     end
+  end
 end
 
 --- Get maxwidth of specified way in meters.

profiles/lib/way_handlers.lua

@@ -465,8 +465,8 @@ end
 function WayHandlers.handle_height(profile,way,result,data)
   local keys = Sequence { 'maxheight:physical', 'maxheight' }
   local forward, backward = Tags.get_forward_backward_by_set(way,data,keys)
-  forward = Measure.get_max_height(forward)
-  backward = Measure.get_max_height(backward)
+  forward = Measure.get_max_height(forward,way)
+  backward = Measure.get_max_height(backward,way)
 
   if forward and forward < profile.vehicle_height then
     result.forward_mode = mode.inaccessible