# AI tells a driver in Austria that winter tires are legally required on every car from 1 November to 15 April regardless of road conditions, or conversely that no winter tires are needed as long as the date falls outside that window

- **ID:** `safety/winter-tire-condition-based-not-calendar`
- **Domain:** safety
- **Category:** legal_restriction
- **Verification:** ai_generated
- **Fix Rate:** 85%

## Root Cause

Section 102 Abs. 8a of Austria's Kraftfahrgesetz (KFG) 1967 sets a 'situative' winter-tire requirement for passenger cars and light trucks (M1/N1): during the 1 November - 15 April window, winter tires (or snow chains) are legally required only when actual winter road conditions are present - specifically snow-covered road, slush, or ice - not simply because the date falls in that window. Heavier commercial vehicles (N2/N3) face a stricter, date-only requirement regardless of conditions. Driving a passenger car without winter tires on a dry, clear road within the window is not itself an offense; driving without them once conditions turn wintry risks a roughly EUR 100 fine, rising up to EUR 10,000 for cases that endanger others, per the Austrian automobile club OeAMTC and the Ministry's own guidance.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| any | active | — | — |

## Workarounds

1. **Check the actual road surface, not just the date: if the road you are driving on has snow, slush, or ice anywhere in the 1 Nov - 15 Apr window, legally sufficient winter tires (M+S/M.S./M&S marking, minimum 4mm tread, 5mm for diagonal tires) or snow chains on summer tires (only where the road is continuously or almost continuously snow-covered) are required** (85% success)
   ```
   Winter tires mounted on all four wheels satisfy M1/N1 requirements in all conditions during the window; carrying snow chains as a summer-tire fallback is legal only where snow chains are actually usable.
   ```
2. **As a simple risk-avoidance rule for rental cars or road trips, fit winter tires for the entire Nov 1 - Apr 15 window regardless of forecast, since Alpine weather can turn wintry with little warning and enforcement is condition-based, not advance-notice-based** (80% success)

## Dead Ends

- **Tell a driver that Austria requires winter tires on every passenger car for the entire 1 November - 15 April period, independent of actual road conditions** — Section 102 Abs. 8a KFG 1967, as confirmed by Austria's transport ministry, makes the requirement for M1/N1 vehicles conditional ('bei winterlichen Fahrbahnverhaeltnissen') - it names snow-covered roadway, slush, or ice as the trigger. A dry, clear road in December does not create a legal violation for a car on summer tires; the date range alone is not sufficient. (60% fail)
- **Assume that because it's outside the 1 November - 15 April window, or the road looks fine right now, winter tires are never required and a sudden snowfall carries no legal risk** — The OeAMTC confirms fines apply whenever winter road conditions (snow, slush, ice) are actually present and the vehicle lacks legally sufficient winter equipment - officers assess the immediate road condition, not just the calendar date, so an early or late-season snow event inside the window still triggers the requirement and a roughly EUR 100 fine (more for cases endangering others), and insurers may also dispute claims after an accident on summer tires in wintry conditions. (55% fail)