road speed unit

data/core.yaml

@@ -772,6 +772,7 @@ en:
       network_ref_direction: "{network} {ref} {direction}"
       network_ref_from_to: "{network} {ref} from {from} to {to}"
       network_ref_from_to_via: "{network} {ref} from {from} to {to} via {via}"
+    speed_unit: "Speed unit"
     roadheight:
       # symbol for meters
       meter: m

modules/ui/fields/roadspeed.js

@@ -60,6 +60,7 @@ export function uiFieldRoadspeed(field, context) {
             .append('input')
             .attr('type', 'text')
             .attr('class', 'roadspeed-unit')
+            .attr('aria-label', t('inspector.speed_unit'))
             .call(unitCombo)
             .merge(unitInput);