One idea being rumoured for SES is to place a vehicle closer to volunteer workplace's. For example, in the Adelaide CBD.
Then volunteers from any SES Unit can register response time to that centralised vehicle. Not sure if a roster would be used or how a crew made from multiple units would work or how politics would affect the idea.
The aim (I believe) is to get trained volunteers on a emergency vehicle as quickly as possible.
From myself this would limit volunteer OH&S issues with people driving distances to LHQ, volunteer travelling cost (one Unit reported that members are using a quarter tank of private petrol on a weekend for six callouts), would be a form of volunteer car pooling to incident/LHQ, lights/sirens available to volunteers if required and volunteers who use public transport to get to work can respond (me included & I am currently a slow response to LHQ vehicles).
Historically and currently SES Unit vehicles are stored in multiple locations. For example, Sturt SES have a vehicle at Sturt Police Station and the rest at their LHQ in Coromandle Valley. Historically Mitcham SES had a vehicle at Brighton.
Again this is a RUMOUR and other ideas are being proposed to improve the SES 'Standard of Emergency Response'.
VMB project oficer had SES members fill out a survey form a few months ago. I believe the project is on-going and no firm proposals have been made.