bus modules question

[utre74]

just have like a decent amount of hours now , just notice theres relative huge amount of train modules but i am more a bus base person so i designed some bus modules witch are also symetric since mess bothers me , just looking for some input or ideas .
i included a screen shot of the base , its just slap together in map maker but not realy seem any modules useing busses on line just train versions , just wonder why that is , the feed always could be trains . just figure i see what people think before makign it in a fresh game . both outside and inside loops are conected to each and the system can be fed from any where around in the empty loops ill make my production things or it can run all to a empty pad .
i know in game it not that eazy for sice wise and make empty space or find big water enz , justa hows the design input and why arnt there bus modules like the train ones am i on a dead end i realy not like trains .

[utre74]

hmm its totaly the wrong picture ,