cuba locomotive plants repair slow train animal animals arrow arrows direction directions humor humour platform platforms railway right sign slow snail speed station traffic train trains advice alert announcement be-careful beware black care careful cars caution cautious communicating communication conditions danger dangerous information informing large-vehicles look-out observant red risk risks road-conditions road-train rural-area safety semi-trailers signage slow-down speed-reduction symbol text trailers transport transportation trucking trucks vehicles warning warning-sign watch watch-out white words