がいとうするがいとうを着てがいとうにあるがいとう柱にもたれ掛かった

I leaned on a lamppost on the street wearing the appropriate coat.って感じ?

lamppost
【noun[countable]】
街灯柱
a tall pole that supports a light over a street or public area
:The car skidded and hit a lamppost.(O)

●BBC:3 January 2013
Reveller drove forklift truck home
Another driver in the same area undertook a marked police car at speeds of more than 100mph on New Year's Day before hitting a central barrier and a lamppost.


●BBC:20 December 2012
Driver crashes car into lamp-post in Dalkeith
Two men are being treated in hospital for serious injuries after the car they were in crashed into a lamp-post in Midlothian.