What size vehicles on O guage layout ?

I have found that 1:43 scale are too large for my O/O-27 layout.  There are some Corgi Lionelville cars and trucks at 1:48. They are almost perfect, but the selection is limited.

I have gone to 1:50 Corgi and Joal diecast and 1:64 DCP, Winross and Penjoy. These Mfgrs hae a very wide array of materials to choose from. They cover the gambit of truck/car types and trailer types. Loads for these mfgrs are super.....can't say enough about them.

I built an intermodal yard....DTTX, Lionel crane etc and in the midst of this, put a large array of these trucks with corgi "heavy haulage" leading the way. 

They can be pricey, but bargains can be had. quality and fit and style for less than a lionel/kline semi truck. 

ralph