It should be alternate unless you kena the suay slot where there
are 2 Ts together. 2 or 3 Ts together only happens when S/E/T Shift
are doing it's last trip or buses going to have meal break.
Hmm... This is not like SMRT Intra-town Services. If one
913 bus arrives at CIQ, the bus after that is 913E, then followed
by a 913 bus, and then another 913E. It's a cycle that rotates for
all SMRT Intra-town services. Regardless of mealbreaks or last trip
for S-shift, the cycles remains the same.
