Dynamic Route Guidance Acoustic Indication System
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Solution Overview
Problem
Modern vehicle navigation systems frequently distract drivers with unnecessary speech outputs and map changes due to frequent updates in traffic conditions, leading to driver distraction and discomfort.
Innovation Solution
A method that generates dynamic acoustic information about route changes based on the location of the deviation between the original and alternative routes in relation to the displayed map section, considering the zoom level and distance from the edge of the screen, to minimize unnecessary distractions. The system suppresses speech outputs for changes occurring outside the visible map area and delays notifications until the affected area is visible, ensuring timely alerts only when relevant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the navigation system provides frequent speech outputs about route changes based on real-time traffic information, then the route guidance reliability is improved, but the driver distraction increases
Solution Approach 1:
The system determines in advance whether a route change is significant by comparing the alternative route with the original route before generating speech output. This preliminary assessment filters out insignificant changes, preventing unnecessary speech outputs that would distract the driver while maintaining reliable guidance for meaningful route changes.
Solution Approach 2:
The system applies different evaluation criteria for different types of route changes. It assesses whether the deviation location is visible on the current map display, whether the route change significantly impacts arrival time or distance, and whether the change represents a major directional shift. This localized quality assessment ensures speech outputs are generated only for genuinely significant changes.
2Loss of information
If the navigation system generates speech outputs for every route change, then the information completeness is improved, but the driver comfort deteriorates
Solution Approach 1:
Instead of providing complete information about every possible route change, the system selectively provides information only for significant changes. It uses thresholds for evaluating whether a route change warrants notification, balancing information completeness with driver comfort by filtering out minor changes that would unnecessarily interrupt the driving experience.
Solution Approach 2:
The system dynamically adjusts its notification behavior based on the significance of the route change. It evaluates multiple factors including the location of deviation, the impact on arrival time, the change in travel distance, and whether the alternative route represents a fundamentally different path. This dynamic assessment ensures information is provided selectively rather than uniformly.
3Loss of information
If the navigation system requires the driver to zoom out to view the changed route on the map, then the route information visibility is improved, but the driver attention to traffic scene is reduced for longer time
Solution Approach 1:
The system automatically adjusts the map display to show the deviation location and alternative route before the driver would need to manually zoom out. This preliminary action ensures the route change information is visible in the current view, eliminating the need for additional driver interaction and maintaining continuous attention on the traffic scene.
Solution Approach 2:
The navigation system automatically repositions and resizes the map display to accommodate the alternative route visualization without requiring driver intervention. The system serves itself by autonomously adjusting the interface to present route change information effectively, freeing the driver from manual operations and reducing attention diversion.
4Loss of information
If the navigation system provides detailed acoustic information about route changes, then the information completeness is improved, but the driver attention is occupied to a greater extent
Solution Approach 1:
The system provides different levels of acoustic information based on the significance and type of route change. For minor adjustments, it provides brief notifications; for major route changes, it provides more detailed information. This localized quality approach ensures information completeness is matched to the actual significance of the change, preventing excessive attention occupation for minor updates.
Solution Approach 2:
The system provides partial acoustic information only when necessary for significant route changes. It selectively activates detailed acoustic announcements based on an assessment of whether the route change fundamentally alters the driving plan, ensuring information completeness is achieved only when it genuinely benefits the driver without excessive attention occupation.
Data Source
AI summary
The invention relates to a method for generating dynamic indications relating to a modification of a route guidance. Original navigational directions are generated along an original route between a starting point and a destination. Due to modified traffic conditions, it can happen that an alternative route is preferable. Therefore an alternative route is provided which is different from the original route. According to the invention, when a vehicle is located at a current location on the original route, an alternative route to the destination is determined, comprising the location of the deviation between the original route and the alternative route. The method also comprises the generation of an acoustic indication relating to a modification of the route guidance in accordance with the zoom level of a map section, represented on a display, in respect to the location of the deviation.