// Notifies truck drivers on road restrictions ahead. Called whenever there is a change.
visualNavigator.setTruckRestrictionsWarningListener(new TruckRestrictionsWarningListener() {
    @Override
    public void onTruckRestrictionsWarningUpdated(@NonNull List<TruckRestrictionWarning> list) {
        // The list is guaranteed to be non-empty.
        for (TruckRestrictionWarning truckRestrictionWarning : list) {
            if (truckRestrictionWarning.distanceType == DistanceType.AHEAD) {
                Log.d(TAG, "TruckRestrictionWarning ahead in: "+ truckRestrictionWarning.distanceInMeters + " meters.");
                if (truckRestrictionWarning.timeRule != null && !truckRestrictionWarning.timeRule.appliesTo(new Date())) {
                  // For example, during a specific time period of a day, some truck restriction warnings do not apply.
                  // If truckRestrictionWarning.timeRule is null, the warning applies at anytime.
                  Log.d(TAG, "Note that this truck restriction warning currently does not apply.");
                }
            } else if (truckRestrictionWarning.distanceType == DistanceType.REACHED) {
                Log.d(TAG, "A restriction has been reached.");
            } else if (truckRestrictionWarning.distanceType == DistanceType.PASSED) {
                // If not preceded by a "REACHED"-notification, this restriction was valid only for the passed location.
                Log.d(TAG, "A restriction just passed.");
            }

            // One of the following restrictions applies ahead, if more restrictions apply at the same time,
            // they are part of another TruckRestrictionWarning element contained in the list.
            if (truckRestrictionWarning.weightRestriction != null) {
                WeightRestrictionType type = truckRestrictionWarning.weightRestriction.type;
                int value = truckRestrictionWarning.weightRestriction.valueInKilograms;
                Log.d(TAG, "TruckRestriction for weight (kg): " + type.name() + ": " + value);
            } else if (truckRestrictionWarning.dimensionRestriction != null) {
                // Can be either a length, width or height restriction of the truck. For example, a height
                // restriction can apply for a tunnel. Other possible restrictions are delivered in
                // separate TruckRestrictionWarning objects contained in the list, if any.
                DimensionRestrictionType type = truckRestrictionWarning.dimensionRestriction.type;
                int value = truckRestrictionWarning.dimensionRestriction.valueInCentimeters;
                Log.d(TAG, "TruckRestriction for dimension: " + type.name() + ": " + value);
            } else {
                Log.d(TAG, "TruckRestriction: General restriction - no trucks allowed.");
            }
        }
    }
});

// Configure the displayed vehicle restrictions.
// Only the specified types will be shown. For example, when TRUCK is set, then only
// icons applicable for trucks are displayed.
// TunnelCategory are closely related to the HazardousMaterial.
// Tunnels are categorized from B (low risk, few restrictions) to E (high risk)
// based on their safety features and the potential danger posed by the goods
// transported through them.
private void configureVehicleRestrictionFilter() {
        List<HazardousMaterial> hazardousMaterials = new ArrayList<>();
        hazardousMaterials.add(HazardousMaterial.EXPLOSIVE);
        hazardousMaterials.add(HazardousMaterial.FLAMMABLE);

        TruckSpecifications truckSpecifications = createTruckSpecifications();

        VehicleSpecification.TruckBuilder truckBuilder = new VehicleSpecification.TruckBuilder()
                .withGrossWeightInKilograms(truckSpecifications.grossWeightInKilograms)
                .withHeightInCentimeters(truckSpecifications.heightInCentimeters)
                .withWidthInCentimeters(truckSpecifications.widthInCentimeters)
                .withLengthInCentimeters(truckSpecifications.lengthInCentimeters)
                .withTruckCategory(MyTruckSpecs.truckCategory)
                .withTunnelCategory(TunnelCategory.B)
                .withHazardousMaterials(hazardousMaterials);

        if (truckSpecifications.weightPerAxleInKilograms != null) {
            truckBuilder.withWeightPerAxleInKilograms(truckSpecifications.weightPerAxleInKilograms);
        }
        if (truckSpecifications.axleCount != null) {
            truckBuilder.withAxleCount(truckSpecifications.axleCount);
        }
        if (truckSpecifications.trailerCount != null) {
            truckBuilder.withTrailerCount(truckSpecifications.trailerCount);
        }

        VehicleSpecification vehicleSpecification = truckBuilder.build();

        TransportSpecification transportSpecification = new TransportSpecification.TruckBuilder()
                .withVehicleSpecification(vehicleSpecification)
                .build();

        MapContentSettings.configureVehicleRestrictionFilter(transportSpecification);
    }

private TruckSpecifications createTruckSpecifications() {
    TruckSpecifications truckSpecifications = new TruckSpecifications();
    // When weight is not set, possible weight restrictions will not be taken into consideration
    // for route calculation. By default, weight is not set.
    // Specify the weight including trailers and shipped goods (if any).
    truckSpecifications.grossWeightInKilograms = MyTruckSpecs.grossWeightInKilograms;
    truckSpecifications.heightInCentimeters = MyTruckSpecs.heightInCentimeters;
    truckSpecifications.widthInCentimeters = MyTruckSpecs.widthInCentimeters;
    // The total length including all trailers (if any).
    truckSpecifications.lengthInCentimeters = MyTruckSpecs.lengthInCentimeters;
    truckSpecifications.weightPerAxleInKilograms = MyTruckSpecs.weightPerAxleInKilograms;
    truckSpecifications.axleCount = MyTruckSpecs.axleCount;
    truckSpecifications.trailerCount = MyTruckSpecs.trailerCount;
    truckSpecifications.truckType = MyTruckSpecs.truckType;
    return truckSpecifications;
}