cannon circle conflict enemy mandatory peace politics prohibitory red road roadsign roadsigns sign signs tank traffic war warning wars auto bus buses busses car minibus post pylon transport transportation travel alert back ban banned caution entry exit go no plate prohibited street way chinese clever knowledge letter nonsence rule rules stop stopped strange ting understand understandable advice authority availability available blue checkered checks communicating communication law mobile mobility motor-bike motor-cycle on-duty order police police-only power regulations responsibility responsible restricted restrictions road-work security symbols vehicle lamp sad sky city right signalling square yellow ahead around the bend Australia bend building buildings cars CBD commute commuting complex curve direction freeway height high highrise highway lamp-posts left-hand driving main road merging merging traffic motor cars motor vehicles office office complex office highrise perspectives road rules road signs skirting the city centre speed traffic flow traffic lanes vehicles care ducks stone writing bridge tunnel 66th panel rabbit