east ‧ bound /ˈiːstbaʊnd/ BrE AmE adjective
[ Word Family: adjective : ↑ east , ↑ easterly , ↑ eastern , ↑ eastbound , ↑ easternmost , ↑ eastward ; noun : ↑ east , easterner, ↑ easterly ; adverb : ↑ east , eastward(s)]
travelling or leading towards the east:
A crash on the eastbound side of the freeway is blocking traffic.