Add OSM node barrier=height_restrictor handling

profiles/car.lua

@@ -9,6 +9,7 @@ Relations = require("lib/relations")
 find_access_tag = require("lib/access").find_access_tag
 limit = require("lib/maxspeed").limit
 Utils = require("lib/utils")
+Measure = require("lib/measure")
 
 function setup()
   return {
@@ -54,7 +55,8 @@ function setup()
       'gate',
       'lift_gate',
       'no',
-      'entrance'
+      'entrance',
+      'height_restrictor'
     },
 
     access_tag_whitelist = Set {
@@ -320,11 +322,18 @@ function process_node(profile, node, result, relations)
   else
     local barrier = node:get_value_by_key("barrier")
     if barrier then
+      --  check height restriction barriers
+      local restricted_by_height = false
+      if barrier == 'height_restrictor' then
+         local maxheight = Measure.get_max_height(node:get_value_by_key("maxheight"), node)
+         restricted_by_height = maxheight and maxheight < profile.vehicle_height
+      end
+
       --  make an exception for rising bollard barriers
       local bollard = node:get_value_by_key("bollard")
       local rising_bollard = bollard and "rising" == bollard
 
-      if not profile.barrier_whitelist[barrier] and not rising_bollard then
+      if not profile.barrier_whitelist[barrier] and not rising_bollard or restricted_by_height then
         result.barrier = true
       end
     end

profiles/lib/measure.lua

@@ -62,11 +62,11 @@ local height_non_numerical_values = Set { "default", "none", "no-sign", "unsigne
 
 --- Get maxheight of specified way in meters. If there are no
 --- max height, then return nil
-function Measure.get_max_height(raw_value,way)
+function Measure.get_max_height(raw_value, element)
   if raw_value then
     if height_non_numerical_values[raw_value] then
-      if way then
-        return way:get_location_tag('maxheight') or default_maxheight
+      if element then
+        return element:get_location_tag('maxheight') or default_maxheight
       else
         return default_maxheight
       end