Navigation System HOV Lane Road Number Display
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Solution Overview
Problem
Conventional navigation systems do not provide users with sufficient information about HOV lanes, such as road numbers, remaining distances, and exit points, making it difficult for users to drive comfortably along these lanes.
Innovation Solution
A navigation system that includes a map information acquiring unit, an HOV lane decision unit, and a control unit to determine if an HOV lane is present and suppress guidance for branch roads when necessary, displaying HOV lane information on the road number and providing visual and auditory cues during travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional navigation systems provide basic route guidance, then the system complexity is low, but the user cannot drive along the HOV lane comfortably due to lack of specific HOV lane information
Solution Approach 1:
The navigation system segments HOV lane information from general road data, separately identifying and displaying HOV lane sections, entrance/exit points, and branch road restrictions. This segmentation allows the system to provide targeted HOV lane guidance without overwhelming the user with all road information, improving ease of operation while managing complexity through selective information presentation.
Solution Approach 2:
The system performs preliminary identification of HOV lane sections, entrance/exit points, and branch roads before the vehicle reaches them. By pre-processing and marking these features in advance, the system prepares HOV lane guidance information ahead of time, enabling smooth transitions and reducing last-minute decision complexity for the driver.
2Measurement precision
If the navigation system provides detailed HOV lane information including road numbers and exit points, then the user can recognize location accurately, but the information processing complexity increases
Solution Approach 1:
The system applies local quality by providing detailed HOV lane information (road numbers, exit points, entrance/exit locations) specifically at relevant HOV lane sections, while maintaining simpler display for non-HOV sections. This targeted approach improves location recognition accuracy where needed without uniformly increasing information processing complexity across all road segments.
Solution Approach 2:
The system pre-identifies and stores detailed HOV lane characteristics (road numbers, exit points, entrance/exit locations) in advance during map data processing. This preliminary action allows the system to retrieve and display precise location information quickly during navigation without performing complex real-time analysis, thus improving measurement precision while managing information processing complexity.
3Loss of information
If the navigation system displays all branch roads in HOV lane sections, then complete route information is provided, but it may misguide users by suggesting exits from HOV lanes where branching is restricted
Solution Approach 1:
The system applies local quality by differentiating the display and guidance treatment of branch roads based on their location relative to HOV lane restrictions. Branch roads within HOV lane sections are marked with special indicators showing restricted access, while branch roads outside HOV sections are displayed normally. This localized differentiation maintains route information completeness while preventing misleading guidance by clearly indicating where branching is restricted.
Solution Approach 2:
The system pre-identifies branch roads located within HOV lane sections and marks them with restriction information during map data processing. By performing this preliminary classification, the system ensures that complete route information is available while accurately indicating which branch roads cannot be accessed from the HOV lane, thus maintaining both information completeness and guidance reliability.
Data Source
AI summary
A navigation system includes: a map information acquiring unit 31 for acquiring map information; an HOV lane decision unit 38 for deciding whether an HOV lane is included in a road represented by the map information acquired by the map information acquiring unit 31 or not; a road number processing unit 43 for performing, when the HOV lane decision unit 38 decides that the HOV lane is included, processing of adding information representing the HOV lane to a road number of the road including the HOV lane; and a display processing unit 44 or a voice information unit 46 for causing the road number passing through the processing by the road number processing unit 43 to be displayed on the guide map or output in voice.