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The following discusses how the National ITS Architecture provides the transportation service described by this service package. Each numbered item describes the operation of that portion of the service package identified with the corresponding number on the transaction set diagram.
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The driver can activate the system and provide steering and other vehicle control inputs to the vehicle (driver inputs) .
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The vehicle receives basic vehicle measures (speed, surface traction), physical presence of potential obstacles and roadway characteristics input (e.g. lane marker position). If a collision seems possible or if the vehicle seems to be departing from the lane, the vehicle may take evasive action (e.g. adjust steering position, change in throttle position, change in transmission gearing, braking) (vehicle control).
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Driver is updated on lateral collision and control conditions (driver updates).
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