// -- capacity determined according to cargo class -- //

switch (FEAT_ROADVEHS, SELF, amblecote_1_switch_cargo_capacity_by_cargo_1, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
        bitmask(CC_MAIL): return 32;
        bitmask(CC_ARMOURED): return 32;
        return 16;
}