Introduction
As automated driving functions reach the market, UNECE has established dedicated regulatory testing requirements for automated driving systems. Among them, R157 (Automated Lane Keeping System) and R171 (automated driving in congestion) are the topics most frequently raised in automated-driving testing consulting.
1. R157: Automated Lane Keeping System (ALKS)
R157 primarily tests a vehicle's ability to follow other vehicles and keep its lane automatically on motorways. The test scenarios include:
- Automatic car-following
- Lane keeping
- Responding to cut-in (another vehicle cutting in)
- Emergency braking by the vehicle ahead
2. R171: Automated Driving in Congestion
R171 focuses on testing the vehicle's capabilities in congested traffic, including:
- Automatic lane keeping
- Start-stop functionality
- Interaction between system take-over requests and driver monitoring
3. Why Test Scenarios Matter
Automated-driving testing is not simply "doing a lap"; it uses standardized scenarios to verify the system's safe response across a wide range of situations. Compliant test scenarios are a prerequisite for an automated driving system to obtain type approval.
4. How to Approach Testing Compliance
- Establish a test plan covering the typical scenarios.
- Combine functional safety, SOTIF and cybersecurity testing.
- Retain test evidence and produce a traceable test report.
Conclusion
Mastering the R157/R171 testing requirements is key for an automated-driving product to enter the market. Professional test-scenario planning can significantly improve compliance efficiency.
Need Compliance Support?
Need R157/R171 test-scenario planning for automated driving? QinGuard provides test-scenario design and compliance consulting to help your product obtain type approval quickly.