If you are going
significantly slower than other vehicles they may start
bunching up behind you increasing the likelyhood of a collision.
When cars start to pile up behind you speed up or, if the
conditions warrent, pull over and let them by at the next
rest area or safe turnout. If there is oncomming traffic
and someone on a bike in front of you, slow down and wait
for the traffic to pass instead of passing between the bike