1. An apparatus for vehicle navigation and driving assistance, comprising: a computer; a road map database stored in said computer; means for acquiring a vehicle's distance traveled and compass heading; means for calculating dead-reckoned coordinates from said vehicle's distance traveled and compass heading; means for acquiring roadway projected coordinates from said road map database; means for determining a probable navigation route for acquiring the next roadway projected coordinates from said map database; means for normalizing said dead-reckoned coordinates to said roadway projected coordinates; and means for displaying said normalized coordinates on a visual representation of a portion of said road map database to assist the user in determining said vehicle's current location.