| Full qualified VSS Path: | Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus |
| Description: | Winter (cold-weather / snow) capability class of the tire currently fitted to this wheel. |
| Comment: | Describes the cold-weather grip capability of the fitted tire, which is the primary determinant of available traction on snow and ice. Modelled as an attribute because it is a property of the mounted equipment that changes only when tires are swapped, not a continuously varying measurement. WINTER indicates a dedicated winter / snow tire (e.g. carrying the three-peak-mountain-snowflake 3PMSF marking), designed for cold-weather rubber compounds and tread patterns that retain grip below approximately 7 degrees Celsius and on snow / ice. NON_WINTER covers summer and all-season tires alike: neither is a dedicated winter tire, and from a snow-traction standpoint both leave the vehicle with materially reduced cold-weather grip. The summer-vs-all-season distinction is a longevity / comfort property that does not change the snow-safety answer and is therefore intentionally not split here. UNKNOWN shall be used when the fitted-tire winter capability cannot be determined (e.g. no tire-identification data available, or input confidence below threshold). Primary consumers: driver-warning systems and navigation systems that adapt snow / mountain-pass routing and advisory thresholds to the grip the vehicle actually has. Combined with per-wheel placement, allows detection of mismatched or partially-fitted winter tire sets. Criteria for each state may be OEM-, market-, or jurisdiction-specific (e.g. national winter-tire regulations differ). Related to VSS issue #877 (Connected Safety signals). |
Navigation
Eclipse Leda: Usage Example
In Eclipse Kuksa.VAL Databroker CLI:
$ databroker-cli
sdv.databroker.v1 > connect
[connect] OK
sdv.databroker.v1 > get Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus
[get] OK
Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus: ( NotAvailable )
sdv.databroker.v1 > set Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus UNKNOWN
[set] OK
Digital Auto: Playground
playground.digital.auto provides an in-browser, rapid prototyping environment utilizing the COVESA APIs for connected vehicles.
| Vehicle Model | Direct link to Vehicle Signal |
|---|---|
| ACME Car (EV) v0.1 | Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus |
Data Type & Unit
| Path | Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus |
VSS: Addressing nodes |
| Data type | string |
VSS: Datatypes |
| Default value | UNKNOWN |
VSS: Sensors & Actuators |
| Allowed values | ['UNKNOWN', 'NON_WINTER', 'WINTER'] |
VSS: Specifying allowed values |
Note: The string datatype is a character string.
Signal Information
The vehicle signal Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus is an Attribute.
The vehicle signal Vehicle.Chassis.Axle.Row1.Wheel.Right.Tire.WinterStatus is a Signal.
Feedback
Do you think this Vehicle Signal specification needs enhancement? Do you want to discuss with experts? Try the following ressources to get in touch with the VSS community:
| Enhancement request | Create COVESA GitHub Issue |
| Join COVESA | www.covesa.global |
| Discuss VSS on Slack | w3cauto.slack.com |
| VSS Data Experts on Google Groups | covesa.global data-expert-group |
About VSS
The Vehicle Signal Specification (VSS) is an initiative by COVESA to define a syntax and a catalog for vehicle signals. The source code and releases can be found in the VSS github repository.
Supported datatypes
The following is a list of VSS supported built-in datatypes:
| Name | Type | Min | Max |
|---|---|---|---|
| uint8 | unsigned 8-bit integer | 0 | 255 |
| int8 | signed 8-bit integer | -128 | 127 |
| uint16 | unsigned 16-bit integer | 0 | 65535 |
| int16 | signed 16-bit integer | -32768 | 32767 |
| uint32 | unsigned 32-bit integer | 0 | 4294967295 |
| int32 | signed 32-bit integer | -2147483648 | 2147483647 |
| uint64 | unsigned 64-bit integer | 0 | 2^64 - 1 |
| int64 | signed 64-bit integer | -2^63 | 2^63 - 1 |
| boolean | boolean value | 0/false | 1/true |
| float | floating point number | -3.4e -38 | 3.4e 38 |
| double | double precision floating point number | -1.7e -300 | 1.7e 300 |
| string | character string | n/a | n/a |
Min, max and default values defined in a Vehicle Signal Specification must be in the supported range of the data type.