Hi everyone, I recently added the US highway shields to my maps. My solution works pretty well and I'll happily make a patch for the default style if people are interested. Here's what I'm currently doing: # Highway shields for the United States. # All highways in the US that aren't link roads and have a reference in the expected format. mkgmap:admin_level2=USA & highway=* & highway~'^(?!.*_link).*$' & ref~'^[A-Z]+(-| )*\d+$' { set usa_hwy_ref_numbers='${ref|subst:"^([A-Z]+)(-| )*(\d+)~>$3"}'; set usa_hwy_ref_letters='${ref|subst:"^([A-Z]+)(-| )*(\d+)~>$1"}' } usa_hwy_ref_letters=I { name '${usa_hwy_ref_numbers|highway-symbol:interstate} ${name}' | '${usa_hwy_ref_numbers|highway-symbol:interstate}'; addlabel '${name}' } usa_hwy_ref_letters=US { name '${usa_hwy_ref_numbers|highway-symbol:shield} ${name}' | '${usa_hwy_ref_numbers|highway-symbol:shield}'; addlabel '${name}' } # State highways are prefixed in OSM with SR or the state code. usa_hwy_ref_letters~'SR|AL|AK|AZ|AR|CA|CO|CT|DE|FL|GA|HI|ID|IL|IN|IA|KS|KY|LA|ME|MD|MA|M|MI|MN|MS|MO|MT|NE|NV|NH|NJ|NM|NY|NC|ND|OH|OK|OR|PA|RI|SC|SD|TN|TX|UT|VT|VA|WA|WV|WI|WY' { name '${usa_hwy_ref_numbers|highway-symbol:round} ${name}' | '${usa_hwy_ref_numbers|highway-symbol:round}'; addlabel '${name}' } One issue I have is that I haven't figured out a way to support multiple highway shields for roads that have multiple interstate, us highway or state highway references. For example, this section of highway has the ref tag set to "I 275;I 96" meaning that it's both interstate I275 and interstate I96. http://www.openstreetmap.org/way/124433753 I tried setting the highway-symbol filter twice on one highway but it didn't work. It this expected work or does the garmin format only allow one shield per highway? Does anybody have any ideas on how I could get multiple highway shields to display when a highway is part of multiple highway references? Thanks, Ben