A tunnel road advance guidance system
A guidance system and tunnel technology, applied in the field of vehicle navigation, can solve problems such as easily causing traffic accidents, and achieve the effects of improving driving safety, reducing driving danger, and simple and accurate positioning algorithms.
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[0050] The present invention is described in detail below in conjunction with accompanying drawing:
[0051] combine figure 1 , the present invention provides a tunnel road advance guidance system, comprising:
[0052] (1) Map data storage module
[0053] The map data storage module is used to store the electronic map, and, along with the road construction, the electronic map needs to be updated in time, so that the electronic map can reflect the latest road information and improve the accuracy of navigation.
[0054] Wherein, the electronic map includes road length information and road attribute information; the road attribute information includes two kinds of attributes: tunnel road attribute and non-tunnel road attribute; tunnel road attribute refers to: a road with a tunnel built above the road; The attribute refers to a road without a tunnel built above the road; therefore, by reading the attribute information of the road, it is possible to quickly know whether a tunnel...
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