Theoretical, the scrap_yard and Incinerator are always available, but you can only transport waste out of 1931 on the way. That's why I created this horse carriage. It costs 0,15¢ for 15m³, which makes it quite more expensive then the later motor cars for waste, but still profitable, since you get 0,08¢ for waste.
(http://uploads.online-urbanus.be/f72437092c6fd615225d56d997469f79)
Download (source + pak) (http://uploads.online-urbanus.be/dd4b9fb5d19dc258973d98c286fcc19a)
In pak64
Thanks ;)