It's amazing that you proclaim and market yourself as a Yishun
bus fan and did not notice the special bus stop almost directly
opposite Yishun MRT which is only served by 811. This bus stop
effectively divides the circuitous route into 2 parts, where peeps
living in Ave 7/Sembawang Rd just take the bus to this bus stop,
alight and cross the road to transfer to the MRT. From Ave 7 it
takes no more than 10mins.
For residents living along Sembawang Rd/Yishun Ave 7, there's
always the option of the much shorter 800 or 965 back home.
If you have bothered to take 811 before, you would have noticed
that the bus loads is lowest between the abovementioned bus stop
and Ave 7, where it starts picking up workers working in the
industrial park and residents back to Yishun Int, where it is at
most a 10-15mins ride away for that section.
Thus effectively the portion of the route is divided into 3
sections serving 2 rather seperate groups -
Yishun Int->Yishun Ave 7 (ITE, workers, residents in
N3,N2)
Yishun Ave 7->Yishun Ave 5 (opp Yishun MRT) (residents in N7,
N1)
Yishun Ave 7->YIshun Int (ITE, workers, residents in
N3,N2)
The connection between these 2 groups serves a small passenger base
who will find it a direct convenient link (eg housewives going to
Chong Pang market, students studying at Ahmad Ibrahim
Secondary)