mtb-zossebart.brf

#
# mountainbike profile by zossebart
# v1.1.4
# see https://github.com/zossebart/brouter-mtb for information and releases
#
# CAUTION! always ride carefully, routing data and/or route calculation might not be accurate and safe at all times!
#

---context:global   # following code refers to global config

assign turnInstructionMode          = 1     # %turnInstructionMode% | Mode for the generated turn instructions | [0=none, 1=auto-choose, 2=locus-style, 3=osmand-style, 4=comment-style, 5=gpsies-style, 6=oruxmaps-style]
assign turnInstructionRoundabouts   = true  # %turnInstructionRoundabouts% | Set to "false" to avoid generating special turning instructions for roundabouts | boolean
assign turnInstructionCatchingRange = 4

# generate a bike route
assign validForBikes            = true
assign validForCars             = false
assign validForFoot             = false

# Locus nav interface flags
assign is_wet                   = 0               # %is_wet% | Choose a safer route in wet conditions | boolean

assign mtb_hard_factor          = 0               # %mtb_hard_factor% | Difficulty of the route (0:xc/am...2:allmountain...4:enduro) | number

# the global elevation parameters
assign downhillcost             = max 0 ( sub 30 ( multiply mtb_hard_factor 10 ) )
assign downhillcutoff           = 4
assign uphillcost               = max 0 ( sub 40 ( multiply mtb_hard_factor 15 ) )
assign uphillcutoff             = 1.5

# elevation filtering parameters (tbd: optimized settings)
assign elevationpenaltybuffer   = 10
assign elevationmaxbuffer       = 10
assign elevationbufferreduce    = 0

# ++++++++++++++++++++++++++++++++++++++ some global defines for finetuning

assign voiceprio                = 2                # 1: all ways have the same prio (max instructions)
                                                   # 2: mtb prio, more instructions on different small way types
assign mj_rd_penalty            = 0.5              # additional penalty for major roads for finetuning
assign construction_penalty     = 3                # penalty for roads in construction (oftentimes rideable by mtb)
assign steps_penalty            = max 0 ( sub 15 ( multiply mtb_hard_factor 5 ) )
                                                   # penalty for steps
assign steps_ramp_uh_penalty    = 5                # penalty for uphill steps with a ramp (might be smaller than default steps penalty)
assign steps_ramp_dh_penalty    = 2                # penalty for downhill steps with a ramp (even smaller than uphill ramp)
assign ferry_penalty            = 5000             # penalty for ferries
assign private_penalty          = 6                # penalty for private ways and nodes
assign bicycle_no_penalty       = 5                # penalty for ways and nodes with bicycle=no
assign slippery_muddy_penalty   = if is_wet        # penalty for unpaved roads and tracks, which are tricky to ride when wet
                                    then 2
                                    else 0
assign ford_penalty             = max 0 ( sub 15 ( multiply mtb_hard_factor 8 ) )
                                                   # penalty for fords (you might not want to get your feet wet ;-) )

assign isbike_reduce            = 0.7              # penalty reduction for major roads with a cycleway
assign isfoot_reduce            = 0.9              # penalty reduction for major roads with a footway or sidewalk

# +++ special downhill parameters
assign considerdownhill         = true             # use special penalties for downhills? (enables/disables below parameters)
assign dh_penalty               = max 0 ( add 2.0 ( multiply mtb_hard_factor 0.5 ) )
                                                   # additional penalty for undesired downhills (e.g. major roads)
assign dh_difficult_penalty     = max 0 ( sub 10 ( multiply mtb_hard_factor 1 ) )                
                                                   # additional downhill penalty for ways with high difficulty (mtb/sac_scale)
assign dh_use_tracks            = lesser mtb_hard_factor 0
                                                   # use less penalty for downhill tracks than for other waytypes? (0/1)
                                                   # enables/disables dh_track_penalty
assign dh_track_penalty         = multiply 0.75 dh_penalty 
                                                   # percentage of reduced downhill penalty for tracks

# +++ special uphill parameters
assign consideruphill           = true             # use special penalties for uphills? (enables/disables below parameters)
assign uh_penalty               = max 0 ( sub 2.5 ( multiply mtb_hard_factor 0.25 ) )
                                                   # additional penalty for undesired uphills (e.g. paths)
assign uh_difficult_penalty     = max 0 ( sub 10 ( multiply mtb_hard_factor 1 ) )
                                                   # additional uphill penalty for ways with high difficulty (mtb/sac_scale or mtb_scale_uphill)

# ------------------------------------------- global defines end

---context:way   # following code refers to way-tags

# classifier constants
assign classifier_none  = 1
assign classifier_ferry = 2

#
# pre-calculate some logical expressions
#

#
# does the road have a footway or sidewalk?
#
assign has_sidewalk             = not ( or sidewalk= sidewalk=no|none )
assign has_footway              = not ( or footway= footway=no|none )
assign has_foot                 = or has_sidewalk has_footway

#
# does the road have a cycleway?
#
assign cycle                    = not ( or cycleway= cycleway=no|none|proposed )
assign l_cycle                  = not ( or cycleway:left= cycleway:left=no )
assign r_cycle                  = not ( or cycleway:right= cycleway:right=no )
assign has_cycleway             = or cycle ( or l_cycle r_cycle )

#
# is it a low-speed highway?
#
assign islowspeed               = if maxspeed=10|20|30 
                                  then true
                                  else false

#
# is it a high-speed highway?
#
assign ishighspeed              = if maxspeed=60|70|80|90|100|110|120|130|rural
                                  then true
                                  else false

#
# are there multiple lanes on the highway?
#
assign ismultilane              = if lanes=
                                    then false
                                    else if lanes=1|1.5|2
                                      then false
                                      else true

#
# assign the penalty reduction for roads with sidewalks or cycleways
#
assign penalty_reduce           = if has_cycleway 
                                    then isbike_reduce 
                                    else if has_foot 
                                      then isfoot_reduce 
                                      else 1 

#
# is the road paved or unpaved?
#
assign ispaved                  = surface=paved|asphalt|concrete|paving_stones|grass_paver|metal|wood|compacted
assign isunpaved                = not ( or surface= ispaved )

#
# is the surface potentially slippery or muddy when it's wet?
#
assign surfacebadwhenwet        = and isunpaved ( not surface=compacted|fine_gravel )
assign highwaybadwhenwet        = or highway=path ( or tracktype=grade5|grade4 highway=bridleway )
assign isbadwhenwet             = or surfacebadwhenwet highwaybadwhenwet

assign any_cycleroute           = or route_bicycle_icn=yes ( or route_bicycle_ncn=yes ( or route_bicycle_rcn=yes route_bicycle_lcn=yes ) )

#
# get the inclination (up=1, down=-1, unknown=0)
#
assign inclination = 
if incline=
  then 0
  else if incline=yes|up|5%|8%|10%|15%|20%|25%|30%
    then if reversedirection=yes
      then -1
      else 1
  else if incline=down|-5%|-8%|-10%|-15%|-20%|-25%|-30%
    then if reversedirection=yes
      then 1
      else -1
    else 0


#
# precalculate steps penaltys
#
assign steps_uh_penalty =
  if or ramp:stroller=yes ramp:bicycle=yes 
    then steps_ramp_uh_penalty
    else multiply 1.2 ( add uh_penalty steps_penalty )         # boost steps uphill penalty even more

assign steps_dh_penalty =
  if or ramp:stroller=yes ramp:bicycle=yes 
    then steps_ramp_dh_penalty
    else add dh_penalty steps_penalty


#
# base penalties for roadtypes
#
assign hw_penalty =
  if      highway=motorway|motorway_link               then 9999
  else if highway=proposed                             then 9999
  else if highway=construction                         then construction_penalty
                                                       else 0

assign hw_major_penalty =
  multiply  if islowspeed                                      # reduce the penalty if the speedlimit is low
              then 0.75
              else 1
  multiply  max 1 ( multiply ishighspeed 1.2 )                 # rise the penalty if the speedlimit is high
  multiply  max 1 ( multiply ismultilane 1.2 )                 # rise the penalty if there are more than 2 lanes  
  if        highway=trunk|trunk_link                   then add mj_rd_penalty 10
  else if   highway=primary|primary_link               then add mj_rd_penalty 6.0
  else if   highway=secondary|secondary_link           then add mj_rd_penalty 2.6
  else if   highway=tertiary|tertiary_link             then add mj_rd_penalty 2.3
  else if   highway=unclassified                       then add mj_rd_penalty 2.2
                                                       else 0

assign hw_minor_penalty =
  multiply  max 1 ( multiply ishighspeed 1.2 )                 # rise the penalty if the speedlimit is high
  multiply  max 1 ( multiply ismultilane 1.2 )                 # rise the penalty if there are more than 2 lanes
  if        highway=residential                         then 1.2
  else if   highway=service                             then 1.1
  else if   highway=living_street                       then 1.1
  else if   highway=pedestrian                          then 1.1
  else if   highway=footway                             then 1.1
                                                        else 0

#
# additional penalties for other road attributes
#
assign mtb_sac_penalty =
  max 0 
  multiply 
  ( sub 1 ( multiply mtb_hard_factor 0.25 ) )
  ( 
    if ( or mtb:scale=3|2+ sac_scale=demanding_mountain_hiking ) then 2
    else if ( or mtb:scale=4 sac_scale=alpine_hiking )           then 4
    else if ( or mtb:scale=5 sac_scale=demanding_alpine_hiking ) then 50
    else if ( or mtb:scale=6 sac_scale=difficult_alpine_hiking ) then 100
                                                                 else 0
  )

assign mtb_uh_penalty =                                         #(supported since 1.4.4)
  max 0 
  multiply 
  ( sub 1 ( multiply mtb_hard_factor 0.25 ) )
  ( 
    if      mtb:scale:uphill=3                             then 2
    else if mtb:scale:uphill=4                             then 4
    else if mtb:scale:uphill=5                             then 50
    else if mtb:scale=6                                    then 100
                                                           else 0
  )

assign tracktype_penalty =
  max 0 
  multiply 
  ( sub 1 ( multiply mtb_hard_factor 0.5 ) )
  (
    if tracktype=grade5                                    then 0.2
                                                           else 0
  )

assign traffic_penalty =
  multiply 
  0.3
  (
    if estimated_traffic_class=2                         then 1
    else if estimated_traffic_class=3                    then 2
    else if estimated_traffic_class=4                    then 3
    else if estimated_traffic_class=5                    then 4
    else if estimated_traffic_class=6                    then 5
    else if estimated_traffic_class=7                    then 6
                                                         else 0
  )

#
# implicit access here just from the motorroad tag
# (implicit access rules from highway tag handled elsewhere)
#
assign defaultaccess =
  if access=
    then ( not motorroad=yes )
    else 
    (
      if access=no
        then false
        else
        (
         if access=private
          then false
          else true
        )
    )

#
# calculate logical bike access
#
assign bikeaccess =
  or 
  any_cycleroute
  (
    if bicycle=
      then 
      (
        if vehicle=
        then defaultaccess
        else 
        ( 
          if vehicle=private|no
          then false
          else true
        )
      )
      else 
      (
        if not bicycle=private
        then true
        else false
      )
  )

#
# calculate logical foot access
#
assign footaccess =
  or bikeaccess
  or bicycle=dismount
    if foot=
      then defaultaccess
      else not foot=private|no

#
# combine to penalty for access
#
assign access_penalty = 
if bikeaccess 
  then 
  (
    if bicycle=no                                                             # bike access granted from above, but check for bicycle=no
      then bicycle_no_penalty                                                 # access with penalty for bicycle=no  
      else 
      (
        if bicycle=dismount                                                   # bike access granted from above, but check for bicycle=dismount
          then ( multiply 0.2 bicycle_no_penalty )                            # access with penalty for bicycle=dismount
          else 0
      )
  )                                                                           # full bike access
  else 
  (
    if ( or  access=private or bicycle=private or vehicle=private foot=private )
      then                                                    private_penalty # access with penalty for private
      else                                                    100000          # absolutely no access
  )

#
# combine additional penaltys which are common for flat, up and down ways
#
assign misc_penalty =
  add access_penalty
  add traffic_penalty
  add if ( not ford= )                                   then ford_penalty
                                                         else 0
  add if trail_visibility=bad                            then 2
        else 
        (
          if trail_visibility=horrible                   then 5
            else
            (
              if trail_visibility=no                     then 15
                                                         else 0
            )
        )
  add if smoothness=impassable                           then 10
                                                         else 0
  max 0 multiply ( sub 1 ( multiply mtb_hard_factor 0.3333 ) )
  add if surfacebadwhenwet                               then slippery_muddy_penalty
                                                         else 0
  add if highwaybadwhenwet                               then slippery_muddy_penalty
                                                         else 0
  if surface=sand|mud                                    then 3
                                                         else 0


#
# now assign the parameters for the routing engine (initialcost, turncost and flat/up/down costfactors)
#
assign turncost = 
  if highway=path|footway
    then 
    (
      if equal inclination -1                            then 0
                                                         else 10
    )
    else
    (
      if highway=track                                   then 50
                                                         else 150
    )

#
# assign parameters for turn instruction generation
#
assign priorityclassifier =
  if      equal voiceprio 1                             then 1
  else if equal voiceprio 2
  then if ( highway=motorway                  )         then  101
  else if ( highway=motorway_link             )         then  100
  else if ( highway=trunk                     )         then  91
  else if ( highway=trunk_link                )         then  90
  else if ( highway=primary                   )         then  88
  else if ( highway=primary_link              )         then  87
  else if ( highway=secondary                 )         then  86
  else if ( highway=secondary_link            )         then  85
  else if ( highway=tertiary                  )         then  84
  else if ( highway=tertiary_link             )         then  83
  else if ( highway=unclassified              )         then  82
  else if ( highway=residential|living_street )         then  50
  else if ( highway=service                   )         then  40
  else if ( highway=road                      )         then  35  
  else if ( highway=cycleway                  )         then  30
  else if ( highway=bridleway|track           )         then  20
  else if ( highway=footway|pedestrian        )         then  17
  else if ( highway=steps                     )         then  15
  else if ( highway=path                      )         then  10
  else                                                        0
  else                                                        0

assign isroundabout             = junction=roundabout
assign islinktype               = highway=motorway_link|trunk_link|primary_link|secondary_link|tertiary_link
assign isgoodforcars            = 
  if ( greater priorityclassifier 30 )
   then true
   else
   (
    if highway=residential|living_street|service 
      then true
      else 
      (
        if ( and highway=track tracktype=grade1 ) 
          then true
          else false
      )
    )

# ... encoded into a bitmask

assign classifiermask           = add multiply isroundabout   4
                                  add multiply islinktype     8
                                  multiply isgoodforcars 16

#
# for any change in initialclassifier, initialcost is added once
#
assign initialclassifier =
     if route=ferry then classifier_ferry
else classifier_none

assign initialcost =
     if ( equal initialclassifier classifier_ferry ) then ferry_penalty
else 0

#
# costfactor for flat terrain
#
assign costfactor =
  if and highway= not route=ferry                       then 100000
    else
    min 9999
    add misc_penalty
    add if ( and ( equal inclination 1 ) mtb_uh_penalty )
          then 
          (
            add 
            mtb_uh_penalty 
            (
              if consideruphill                         then uh_difficult_penalty 
                                                        else 0                                                                  
            )
          )
                                                        else mtb_sac_penalty
    add tracktype_penalty
    max 1
    if hw_penalty                                       then hw_penalty
    else if hw_major_penalty                            then hw_major_penalty
    else if hw_minor_penalty                            then hw_minor_penalty

    else if highway=path                                then 1
    else if highway=steps                             
      then 
      (
        if equal inclination 1                          then steps_uh_penalty
        else
        (
          if equal inclination -1                       then steps_dh_penalty
          else
          (
            if reversedirection=yes                     then steps_dh_penalty
                                                        else steps_uh_penalty
          )
        )
      )
    else if highway=track|bridleway                     then 1
    else if highway=cycleway                            then max 1 ( add 1.1 ( multiply mtb_hard_factor 0.1 ) )
                                                        else 40 # default for any other highway type not handled above

#
# costfactor for uphills
#
assign uphillcostfactor =
  if consideruphill
    then 
    (
      if and highway= not route=ferry                   then 100000
      else
      min 9999
      add misc_penalty
      add if ( and ( equal inclination 1 ) mtb_uh_penalty )
                                                        then add uh_difficult_penalty mtb_uh_penalty
          else 
          (
            if mtb_sac_penalty                          then add uh_difficult_penalty mtb_sac_penalty 
                                                        else 0 
          )                                                        
      add if tracktype_penalty                          then add uh_difficult_penalty tracktype_penalty 
                                                        else 0
      max 1
      if hw_penalty                                     then hw_penalty
      else if hw_major_penalty                          then multiply penalty_reduce hw_major_penalty
      else if hw_minor_penalty                          then hw_minor_penalty 

      else if highway=path                              then uh_penalty
      else if highway=steps                             # first try to use incline
        then if equal inclination 1                     then steps_uh_penalty
        else if equal inclination -1                    then steps_dh_penalty
                                                        else steps_uh_penalty # no incline tag, assume step is really uphill
      else if highway=track                             then 1
      else if highway=bridleway                         then 1.2
      else if highway=cycleway                          then 1
                                                        else 40 # default for any other highway type not handled above
    )
                                                        else 0 # no special handling for uphill selected, flat costfactor will be used instead

#
# costfactor for downhills
#
assign downhillcostfactor = 
  if considerdownhill
    then 
    (
      if and highway= not route=ferry                   then 100000
      else
      min 9999
      add misc_penalty
      add if ( and ( equal inclination 1 ) mtb_uh_penalty )
          then 
          (
            add if consideruphill                       then uh_difficult_penalty
                                                        else 0 
                                                             mtb_uh_penalty
          )
          else 
          (
            if mtb_sac_penalty                          then add dh_difficult_penalty mtb_sac_penalty 
                                                        else 0
          )
      add if tracktype_penalty                          then add dh_difficult_penalty tracktype_penalty
                                                        else 0
      max 1
      if      hw_penalty                                then add dh_penalty hw_penalty
      else if hw_major_penalty                          then add dh_penalty hw_major_penalty
      else if hw_minor_penalty                          then add dh_penalty hw_minor_penalty

      else if highway=path                              then 1
      else if highway=steps                             # first try to use incline
        then if equal inclination 1                     then steps_uh_penalty
        else if equal inclination -1                    then steps_dh_penalty
                                                        else steps_dh_penalty # no incline tag, assume step is really downhill
      else if highway=track|bridleway
        then if dh_use_tracks                           then dh_track_penalty 
                                                        else dh_penalty
      else if highway=cycleway                          then add dh_penalty 0.5
                                                        else 40 # default for any other highway type not handled above
    )
                                                        else 0 # no special handling for downhill selected, flat costfactor will be used instead

---context:node  # following code refers to node tags

assign defaultaccess =
  if access=
    then 
    (
      if barrier=gate|fence|door|wall                   then false 
                                                        else true 
    )
    else
    (
      if access=private|no
                                                        then false
                                                        else true
    )

assign bikeaccess =
  or nodeaccessgranted=yes
  if bicycle=
    then 
    (
      if vehicle=                                       then defaultaccess
      else
      (
        if vehicle=private|no                           then false
                                                        else true
      )
    )
    else
    (
      if bicycle=private|no|dismount                    then false
                                                        else true
    )

assign footaccess =
  or bicycle=dismount
  if foot=                                              then defaultaccess
    else if foot=private|no                             then false
                                                        else true

assign initialcost =
  add  if highway=traffic_signals                       then 100  
                                                        else 0
  if ( and ( or bikeaccess footaccess ) ( not highway=elevator ) )
    then 
    (
      if ( or ( not ford= ) highway=ford )              then ( multiply 100 ford_penalty )
                                                        else 0
    )
#    switch  or access=private
#            or bicycle=private
#            or vehicle=private
#            foot=private
#      multiply 100 private_penalty   # access with penalty
                                                        else 1000000