This paper outlines the procedure used to assess the performance of a Lane Keeping Assistance System (LKAS) in a virtual test environment using the newly developed Euro NCAP Lane Support Systems (LSS) Test Protocol. A method to automate the testing and analysis of this test is also outlined. The Euro NCAP LSS Test defines test paths for left lane departures and ten for right lane departures that must be followed by the vehicle before the LKAS activates. Each path must be followed to within a specific tolerance. The driver inputs required to ensure the vehicle follows the test path are calculated. These tests are then run concurrently in the virtual environment by combining two different software packages. Important vehicle variables are recorded and processed, and a pass/fail status is assigned to each test automatically. Any vehicle with a LKAS, and a validated parameter set can therefore be tested and analysed automatically using this method. Automated testing and analysis of a LKAS ensures reduced testing time, and increased system robustness. This method can also be used as a template for the testing of other Advanced Driver Assistance Systems.