Thank you, and you're welcome. I'd definitely recommend aiming to keep shutter speed at 1/250 or better. If your camera allows you to set a shutter speed range, that would be a great way to go in Shutter priority mode. Otherwise, your camera may also have a 'sports' mode which can be quite useful if it allows user adjustments. I normally wouldn't recommend a scene mode on a DSLR, but with user adjustments, they can be as good or better than S or A priority. On my camera, I set to Sports mode - which sets the camera to continuous tracking focus, auto ISO between 100-800, minimum shutter 1/250 or higher, and auto aperture as needed. I adjust focus mode to spot, metering to center-weight, add -1/2 EV, and I'm ready to go. As I shoot, I can turn the jog wheel at front to override an aperture choice to control depth of field, and can manually override the ISO with the top control button without pulling my eye from the viewfinder, if I want to force a lower or higher ISO than the camera chooses.
BTW - I always recommend shooting with your eye to the viewfinder whenever possible - it's a much more stable way to shoot and keep the lens pointed at the subject from a moving vehicle. Just be aware of your surroundings, so you don't bump the lens into a roof pillar and give yourself a black eye! I've occasionally used Live View on my DSLR to shoot from the LCD, on the rare occasion when action was on the other side of the truck and there were too many heads in the way...but it is so much harder to hold a long telephoto lens steady on a subject from a moving platform with the camera held out at arm's length and viewing an LCD screen!