Just before the end of the Ormond-McKinnon-Bentleigh shut, I thought I'd have a look at how they've arranged the bustitution.
First, there are separate Express and Stopping services and these have different routes. The stopping services use Grange/Jasper Roads on the east side of the line. The express services use Thomas St/Bambra Road on the west side of the line. Both Caulfield and Moorabbin have separate loading/unloading points for the two services.
At Caulfield, the loading and unloading points are, not surprisingly, in Normanby Rd on the South side of the station. The stopping service location is at the foot of the ramp to Platform 1 near the entrance to the car park. It's a relatively simple arrangement; buses pull up, let off the passengers, pull forward to the marque, load and off they go. The facilities for the express service are considerably more sophisticated. The stopping point is located about 50 metres west of the subway. Inbound and outbound express passengers are almost completely segregated. Express passengers access Platform 1 using the racecourse entrance which is just west of the subway (this has its own ramp to Normanby St). Once on Normanby St, there are segregated pedestrian walkways west to the bus stop. Outbound passengers walk on a cordoned off section of the road. Inbound passengers use the footpath. There are separate loading and unloading areas for the buses. The loading area is first and has about four marques to give some protection to the waiting passengers. The unloading area is beyond. Bus layover areas are in Normanby Rd west towards Smith St, and in Smith St itself.
(One interesting feature of this arrangement is that arriving passengers on the stopping buses use the normal entrance to Platform 1 and pass the Myki validators. As the passengers don't validate on the bus, this allows them to touch on. Express passengers don't pass any Myki validators, but they are likely to have touched on prior to arriving at Moorabbin.)
At Moorabbin, there are separate loading points for express and stopping buses in Station St (east of the station). The stopping loading point is in the new bus station south of the station entrance. The express loading point is in the station car park north of the station entrance. A fenced off walkway has been provided along the boundary of the car park to a marque at the northern end of the car park. There is standing room for about four or five buses in the car park. It appears that both services use a common unloading point in the Nepean Hwy service lane on the west side of the station. Standby buses stand in the service lane to the north of the unloading point.
The stopping service runs east along Normamby Rd, then Queens Ave, Neerim Rd, Grange Rd, Jasper Rd, and finally South Rd. The buses appear to cross the railway line and turn into the Nepean Hwy service lane to drop off. They then re-enter the Nepean Hwy, cross the line, and turn into Station St and the stopping pick up point. They then continue along Station St, turn right into South Rd and back the way they came. At Caulfield it appears they do a loop around Station St, Smith St, and Normanby Rd to reach the drop off point. The intermediate stops are: Glenhuntly: Inbound: 127 Grange Rd (cnr Rosedale Ave), Outbound 134 Grange Rd (cnr Parton Crt); Ormond: Inbound 293 Grange Rd (cnr Walsh St); Outbound roughly opposite; McKinnon: Inbound outside the McKinnon Hotel (cnr McKinnon Rd); Outbound about 50 metres south of McKinnon Rd; Bentleigh: Inbound and outbound south of Centre Rd in front of Woolworths; and Patterson: Outbound 70 Jasper Rd (cnr Mortimer St), Inbound opposite in front of the park. All stops are continuously staffed with one person each on the inbound and outbound sides. All stops have a marque.
The express service appears (I haven't completely traced it) to turn into Station St at Caulfield, then Kambrook Rd, Glen Eira Rd, Bambra Rd, Thomas St, Nepean Hwy, to the drop-off point on the west side of Moorabbin station. Then loop to Station St, pick up, turn left into South Rd, back to Nepean Hwy to retrace their steps to Caulfield.