Trail bikers going like hell with their head down, oblivious to anything r anybody else on the trail. Road bikers riding two or four abreast on a two lane country road. If they want to ride on the roads,they should be licensed on the bicycle
If we assume a road is too narrow to safely overtake a bicyclist completely within that lane. In other words, you have to move into the oncoming lane to safely go around them, then you'll spend less time in the oncoming lane if they are side by side rather than end to end. There's a cool video that demonstrates this. If the lane is wide enough to safely share, then they need to get their asses in single file to help a brother out.
