Spatial positioning code for urban expressway

The invention discloses a spatial positioning code for an urban expressway, which is segmented by taking an entrance ramp confluence nose end of the urban expressway as a starting point to form a number AB-ab-X-00-99, AB is the abbreviation of the current expressway, and X-X-99 is the abbreviation of the current expressway. Ab, naming an intersection road of a first lamp control intersection in front of the entrance ramp for short; x is the advancing direction of one side of the current expressway to be numbered, which comprises east, south, west or north for short; 00-99, taking the confluence nose end of the current entrance ramp as a starting point, numbering to be 00, adding 1 to the confluence nose end every 100 meters along the advancing direction of one side of the current expressway, and continuously numbering the length of the road section to be 10 km. Therefore, when conditions that a driver gives an alarm due to traffic accidents, a traffic police receives and processes alarms, rescue workers carry