okay i just had a bunch of cedars removed because they where causing a safety/traffic hazards. i now have a few of the neighbors yard i don't want. what i need is something that will grow quickly, grows vertical and doesn't make a mess. problems i have is these trees would be 18' from the house and this are will eventually be a drive way for larger vehicles(ie motor home) so i'd like to go vertical and bushy as much as possible. doesn't need to be super tall i'd settle for 20-25 foot tall trees. i live in eugene oregon.