| CPC G08G 1/0112 (2013.01) [G08G 1/0125 (2013.01); G08G 1/052 (2013.01); G08G 1/20 (2013.01)] | 13 Claims |
|
1. A road management apparatus comprising:
a communication unit that communicates with in-vehicle detection devices mounted on a plurality of vehicles over a communication network, the plurality of vehicles including a first group of vehicles traveling on a first traveling lane of a road and a second group of vehicles traveling on a second traveling lane of the road adjacent to the first traveling lane, the second group of vehicles traveling in the same direction as the first group of vehicles; and
an electronic control unit including a microprocessor and a memory connected to the microprocessor, wherein
the microprocessor is configured to perform:
acquiring detection information from the in-vehicle detection devices via the communication unit, the detection information comprising at least position information of the vehicles and driving information of the vehicles;
storing the driving information and the position information in the memory, the driving information including vehicle speed information of the first group of vehicles and vehicle speed information of the second group of vehicles, in association with the first traveling lane and the second traveling lane, the driving information and the position information being acquired in each of a first period and a second period, the second period being earlier than the first period;
estimating an occurrence of an abnormality on the road in the first period, in accordance with a degree of divergence between the driving information in the first period and the driving information in the second period stored in the memory; and
outputting information on the occurrence of the abnormality, wherein
the estimating of the occurrence of the abnormality includes calculating a first speed difference defined as a difference between a first vehicle speed acquired from the vehicle speed information of the first group of vehicles in the first period stored in the memory and a second vehicle speed acquired from the vehicle speed information of the second group of vehicles in the first period stored in the memory, calculating a second speed difference defined as a difference between a third vehicle speed acquired from the vehicle speed information of the first group of vehicles in the second period stored in the memory and a fourth vehicle speed acquired from the vehicle speed information of the second group of vehicles in the second period stored in the memory, and estimating the occurrence of the abnormality on the road in the first period in accordance with a degree of divergence between the first speed difference and the second speed difference.
|