A railroad crossing gate (20) is disclosed having a novel crossing arm (24) which includes a first longitudinal arm (26) member with a telescopically inserted second longitudinal arm member (28). The second arm member (28) is slideable to any one of a plurality of extendable positions and a fastener...http://www.google.com/patents/US4666108?utm_source=gb-gplus-sharePatent US4666108 - Extensible railroad grade crossing gate arm
