| 摘要 |
A system whereby vehicles travelling on unmapped roadways, such as logging or industrial roadways, may initially record a linear distance electronic image of the roadway being travelled, based upon position data received and stored from a remote satellite global positioning system, and, using the position data, to continuously broadcast a radio frequency signal identifying that position on that roadway and receive from at least o ne other suitably equipped vehicle a continuously broadcast radio frequency signal of the othe r vehicles' coordinates so that a suitable visual or auditory signal may be activated to warn the operator of the vehicles when the vehicles close within a predetermined range.
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