| 摘要 |
PROBLEM TO BE SOLVED: To obtain a measuring method for traffic volume which estimates the traffic volume on a road where a vehicle is traveling in an object section by calculating the mean travel distance and mean travel speed of road traffic by taking and comparing aerial photographs or satellite photographs of a road traffic state and specifying identical vehicles. SOLUTION: The position of a vehicle D in a road section A to be investigated is decided and specified by an existent segmenting method by using aerial photographs taken at time T1 and time T2, a travel distance E is calculated through the comparison with a topographical map and a travel speed V is calculated. Travel distance and speeds of other vehicles are similarly calculated to find the traffic volume in a time interval T0. An estimated value obtained by expanding the result of repetitive short-time photography to one hour value is defined as the road traffic volume of the time zone. |
