This will allow others to pass on your left without going into the lane of oncoming traffic. This is particularly important on the hills where the pack breaks up. Too often, riders will climb near the center line forcing faster riders to ride in the lane of oncoming traffic in order to pass. If you are getting passed on the hills, move over to give them some room. Stay out of the lane of oncoming traffic.
Cars travel fast and can appear suddenly.
Try not to pass on the right. THE ROAD - Nearly all the roads we ride on carry auto traffic as well as bicycles. We are adamant about our right to ride these roads but we have an obligation to ride in a manner than keeps conflicts to a minimum. The vast majority of the drivers are considerate of bikers. We tend to focus on the few that we exchange words with before they speed into the distance.