Electronic speed limit notification system
First Claim
Patent Images
1. An electronic speed limit notification system comprising:
- at least one transmitter for transmitting speed limit information ("SLI"), said SLI comprising;
at least one speed limit, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific route traveling in a specific direction; and
route designator information for each speed limit of the SLI, the route designator information indicating the specific route to which the speed limit applies.
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Abstract
An electronic speed limit notification system comprises a transmitter for transmitting speed limit information ("SLI"), and a receiver for receiving said transmitted SLI, wherein said receiver can be physically located in a vehicle. The SLI comprises one or more speed limits, wherein each speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific road traveling in a specific direction.
84 Citations
42 Claims
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1. An electronic speed limit notification system comprising:
at least one transmitter for transmitting speed limit information ("SLI"), said SLI comprising; at least one speed limit, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific route traveling in a specific direction; and route designator information for each speed limit of the SLI, the route designator information indicating the specific route to which the speed limit applies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In an electronic speed limit notification system comprising at least one transmitter for transmitting speed limit information ("SLI"), a receiver for receiving transmitted SLI for use in a vehicle, said receiver comprising means for presenting at least part of said SLI to a person controlling said vehicle, said SLI comprising:
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at least one speed limit, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific route traveling in a specific direction; and route designator information for each speed limit of the SLI, the route designator information indicating the specific route to which the speed limit applies. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An electronic speed limit notification method comprising:
- transmitting speed limit information ("SLI"), said SLI comprising;
one or more speed limits, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific road traveling in a specific direction; and road designator information for each speed limit of the SLI, the road designator information indicating the specific road to which the speed limit applies. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
- transmitting speed limit information ("SLI"), said SLI comprising;
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41. In an electronic speed limit notification system comprising at least one transmitter for transmitting speed limit information ("SLI"), said SLI comprising at least one speed limit, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific route traveling in a specific direction, a receiver for receiving transmitted SLI for use in a vehicle, said receiver comprising means for presenting said SLI to a person controlling said vehicle.
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42. An electronic speed limit notification method comprising:
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transmitting speed limit information ("SLI"), said SLI comprising one or more speed limits, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific road traveling in a specific direction; receiving, in a vehicle, transmitted speed limit information ("SLI"), said SLI comprising one or more speed limits, wherein said speed limit is the maximum or minimum legal speed for specific vehicles on a specific segment of a specific road traveling in a specific direction; and deciding whether or not an applicable speed limit remains valid, wherein said step of deciding comprises using an algorithm that (i) measures the change in the vehicle'"'"'s DOT since the last update or the difference between the vehicle'"'"'s current DOT and the DOT field of the last update, (ii) measures the elapsed time since the last update, possibly using different time thresholds for different speed limits or types of roads or types of areas, (iii) measures the elapsed distance since the last update, possibly using different distance thresholds for different speed limits or types of roads or types of areas, and (iv) recognizes a disable code, said code possibly being a speed limit of zero for a given road and DOT and vehicle class.
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Specification