## 3 Method
### Experimental Setup  
The study was conducted on the motorway sections A81 and A8 between Sindelfingen-East and Kirchheim under Teck-East with a length of 71 km (see Figure 1) and consisted of a manual and a conditional automated drive. Two vehicles of the same model with different equipment lines were used. The suspension settings were set to comfort in both vehicles. Before the start of the first drive, the participants were instructed with the study procedure, the test route was explained, and a preliminary questionnaire was completed. In the first part of the study, participants drove completely manually without the use of active assistance systems on the specified test route, using a navigation system. For the manual drive, an S-Class (W223) with a steering wheel that has no activation buttons for CAD and monochrome paint was used. During the first half of the route from Point A to Point B, the participants' personal driving style (PDS) was measured. In order to keep the influence of the study setting on the personal driving style as low as possible, the participants did not receive any instructions from the experiment leader for their driving behavior and were not informed about the measurement equipment installed in the trunk. Instead, the participants' focus was directed towards familiarizing themselves with the route, which has no effect on personal driving behavior, but plays an important role in the evaluation during the conditional automated drive. Driving the route beforehand prevents evaluation influences caused by unfamiliarity with the route. The first half of the route ends at a parking lot, which is located directly at the exit Kirchheim unter Teck-East (return Point  
Figure 1: Test route on German motorway A8/A81 between Sindelfingen East and Kirchheim unter Teck East. Section A-B: Recording of personal driving style (PDS). Section B-C: Recording of demonstrated desired driving style (DDS). Section A-C: Recording of automated driving style (ADS). Maps Data: Google, © 2023 GeoBasis-DE/BKG (©2009) [73]. B). For the way back (B-C), participants are asked to demonstrate their desired driving style (DDS) for an automated L3 system through manual showcasing. After the first drive, participants were asked to fill out a second questionnaire. For the second drive, the participants changed to a different S-Class (W223). Due to a lack of approval for an L3 system with functional availability at speeds above 60 km/h, the participants sat in the passenger seat and were driven on the same route with a simulated L3 functionality from A to B and back to C. For this purpose, the L2 assistance systems were presented as an L3 system, which was activated and monitored by a safety driver in the driver's seat. In order to further increase the credibility of the L3 functionality for the participants, an S-Class with a steering wheel with two activation buttons for CAD and special external fooling was used for the automated drive. This emphasized the contrast of functionality of the two vehicles for the participants. The safety driver had his hands near the steering wheel while driving but only touched it when the L2 assistance systems reached their limits or to generate variance in the maneuvers. The driving style guideline of the automated test vehicle is characterized as follows:  
1. Compliance with traffic regulations such as strict adherence to speed limits. 2. The AV's maximum speed was set to 130 km/h and was based on the recommended speed for motorways of the German Road Traffic Act. 3. The time gap to the lead vehicle was varied in four settings between one and two seconds to analyze user preferences. For each route quarter, one of the four time gaps was set randomly. 4. The in-lane driving path in curves on motorway feeder roads, on- and off-ramps is varied between driving in the lane center and driving closer to the inside of the curve to analyze user preferences.