Porsche’s appropriately-named ‘InnoDrive with Active Lane-Keeping’ accurately portrays the system functionality. The promotional material and the handbook correctly indicate the limitations of the system capabilities. System status information is clearly displayed in the driver’s direct line of sight by a head-up display. The Macan monitors that the driver keeps their hands on the steering wheel, and ‘locks-out’ the assistance system if there are repeated warnings. The car’s indirect driver monitoring system detects fatigue but not distraction. The system balances driver steering input with lane guidance, promoting co-operative driving.

The Macan combines map-based speed limit information with real time camera inputs to manage fixed, variable and temporary speed limit signs. The system uses navigation data to adapt the speed within the detected speed limit to the course of the route (e.g. when there are curves ahead). If an event is detected in advance, a warning is given in the instrument cluster and the system reduces the speed of the vehicle at an early stage. The car responds to avoid or mitigate a collision in all of the test scenarios for automatic cruise control and scores well in this part of the assessment. The driver is supported through the S-Bend, staying within the lane at all test speeds. The Porsche does not have a lane change assist feature. In the case of an unresponsive driver, the car performs a controlled stop within its lane. If the radar or camera is blocked, the Macan provides a timely warning and prevents system activation.

‘InnoDrive with Active Lane-Keeping’, as fitted to the Porsche Macan, balances a high level of Vehicle Assistance with a similar level of Driver Engagement. Combined with excellent safety back-up, the system, overall, offers Very Good highway assistance.