caption: Volume (q) Number of vehicles passing a point during a given time interval.
exif: {"Image DocumentName": "Volume (q)Number of vehicles passing a point during a given time interval.", "Image ImageDescription": "Typically quantified by Rate of Flow (vehicles per hour) .", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}