1. A computer-implemented method for providing information related to vehicle travel on roads, the method comprising: for each of one or more roads, providing information related to vehicle travel during a period of time on the road, by: obtaining multiple data samples that are each of one of multiple types and that reflect travel characteristics of vehicles traveling on the road during the period of time, the obtained multiple data samples including multiple road traffic sensor readings that are each generated by one of one or more road traffic sensors associated with the road, the obtained multiple data samples further including multiple mobile data source data samples that are each reported by one of one or more mobile devices moving along the road; automatically assessing the obtained data samples to identify a group of multiple data samples of multiple types to represent actual vehicle travel on the road during the period of time, the identifying of the group including excluding one or more data samples that are identified as being unrepresentative of actual vehicle travel on the road, the automatic assessing being performed by one or more programmed computing systems; automatically analyzing the identified group of multiple data samples in order to determine one or more estimated measurements of actual traffic flow during the period of time on the road, the automatic analyzing being performed by the one or more programmed computing systems; and providing one or more indications of the determined estimated actual traffic flow measurements for use in facilitating travel on the road.