Thank God PD put a track system like this in GT5, SS5 works as inner C1 in shinjuku, SS7 works as bayshore route, And the cool thing on Special stage 7 in side one of the loops there is a sign saying "aqua line" PD paying homage to the real wangan. Also SS5 and SS7 are both connected, And rumors are SS11 will make a return based off the C1 longer loop. so SS5,SS7,SS11 will be connected because SS5 is connected to SS7, in a tunnel in SS5, it says exit to route 7, epic.
@TimesNewSparta Tokyo Xtreme Racer, such an underrated racing game on the PS2, I have Tokyo Xtreme Racer Zero and 3 as well, Zero happens to be the second game from the Dreamcast, ported over to PS2