Skip to main content

Road events

Navigation SDK UX Framework exposes the DashRoadInfoEvent class to observe road data like lanes, directions, categories, etc. and speed limits.

class DashRoadInfoEvent internal constructor(
val roadInfo: DashRoadInfo?,
val speedLimit: DashSpeedLimit,

DashRoadInfo contains the road description while driving.

class DashRoadInfo internal constructor(
val countryCodeIso2: String?,
val drivingSide: DashDrivingSide,
val isOneWay: Boolean,
val laneCount: Byte,
@DashRoadClass.Type val roadClass: String?,
  • countryCodeIso2 - the country code (ISO-2 format) of the road.
  • drivingSide - right-hand (DashDrivingSide.DRIVING_SIDE_RIGHT) or left-hand (DashDrivingSide.DRIVING_SIDE_LEFT) traffic type.
  • isOneWay - true if current road is one-way, otherwise false.
  • laneCount - the number of lanes on the road.
  • roadClass - classify road using DashRoadClass.

DashSpeedLimit represents the current speed limit on the road.

class DashSpeedLimit internal constructor(
val speedLimitValue: Int?,
val speedUnit: DashSpeedLimitUnit,
  • speedLimitValue - the value of the speed limit, otherwise null
  • speedUnit - DashSpeedLimitUnit.MILES_PER_HOUR or DashSpeedLimitUnit.KM_PER_HOUR

The host application can observe the road info events through the Dash.controller instance.

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

lifecycleScope.launch {
repeatOnLifecycle(Lifecycle.State.STARTED) {
.collect { /* DashRoadInfoEvent */ event ->
// Do something with the DashRoadInfoEvent

fun processRoadInfoEvents(event: DashRoadInfoEvent) {
"Showing road info: $event ",
Was this page helpful?