Closest thing you can use is the invisible signal. There is a menu that allows you to set speeds for junction direction and for class of consist, 1-2 or 3. This class must also be set at the loco menu, where you assign one of these numbers. Works perfect but being invisible.. you don't see. But there are Australian or Zealand signals (round yellow) with a main speed and a diverting left or right indicator, they don't work for divert, but you can use the invisible one to set your speed: Use your imagination