TheoTown

at normal speed trains cars factories etc moves well, but when i use fast or ultra fast mode my cars gets slower however factories kittens and trains gets faster. i dont know its written in forum. maybe im doing sth wrong or its just a bug. anyway good to inform develepoers

Most likely your device imposing sanctions on processing to cool down. Mine does this, especially after about 10 minutes at ultra fast speed in any city with 80,000 or more inhabitants.