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Assisting the older driver - SWOV

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7.3. Preconditions for safe use of ADAS 142<br />

7.3.1. User acceptance 142<br />

7.3.2. Design principles for <strong>the</strong> human machine interface 143<br />

7.3.3. ADAS that work toge<strong>the</strong>r 144<br />

7.3.4. Side‐effects: human‐out‐of‐<strong>the</strong>‐loop and behavioural<br />

adaptation 145<br />

7.3.5. Interaction between <strong>driver</strong>s with and without ADAS 148<br />

7.4. Conclusions regarding ADAS that can improve <strong>the</strong> safety of <strong>older</strong><br />

<strong>driver</strong>s 149<br />

8. Effects of a <strong>driver</strong> support system on workload and driving<br />

performance of <strong>older</strong> <strong>driver</strong>s 152<br />

8.1. Introduction 152<br />

8.2. Method 156<br />

8.2.1. Participants 156<br />

8.2.2. Procedure 157<br />

8.2.3. Driving simulator 159<br />

8.2.4. Route 159<br />

8.2.5. Design and data‐analysis 160<br />

8.2.6. Driver assistance system 162<br />

8.2.7. Data‐sampling 163<br />

8.2.8. Questionnaires 165<br />

8.3. Results regarding effects on workload and <strong>driver</strong> performance 166<br />

8.3.1. Baseline values for secondary task performance 166<br />

8.3.2. General effect of <strong>driver</strong> support 168<br />

8.3.3. Messages regarding priority regulation 169<br />

8.3.4. Messages regarding safe gaps to join or cross 173<br />

8.3.5. Messages regarding an obstructed view of <strong>the</strong> intersection176<br />

8.3.6. Messages regarding changed speed limits or one‐way<br />

streets 177<br />

8.4. Results regarding user acceptance 179<br />

8.4.1. Age differences 180<br />

8.4.2. Effect of having experienced <strong>the</strong> support system 182<br />

8.4.3. Effect of <strong>driver</strong> characteristics 183<br />

8.4.4. System evaluation 184<br />

8.5. Discussion and conclusions 185<br />

8.5.1. Effects on workload and <strong>driver</strong> performance 185<br />

8.5.2. User acceptance 188<br />

8.5.3. Limitations 190<br />

8.5.4. Conclusions 191

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