Keith G,coulour light signaling was placed at various heights ,controld by a drivers line of vision,in other words where it could be seen best ,a lot had to be taken into consideration,time of year ,position of the sun ,local conditions.At certain times of the year,there were some signals that had a fair share of
SPADs ,Some large stations ,when the driver past the starter he would be met by an array of gantry mounted CLS, some had feathers (rout indicating lights ) plus a mass of 'information lights ,all very confusing if your rout knowledge was not top notch.raiway signaling is a world of ts own,it occupies a considerable amount of a drivers time learning routs , and he has to be passed and signed off for any route he will drive over,
Question time :-any one know what a "Bobbi's "task was on early railways ,answer next week😀