well my timtable is.on monday and tuesday only..monday starts 9am, tuesday starts 10am. so would it be better to go to riverstone station which is 10mins drive and then catch train to central, or catch a 610 bus which right infront of my house and go yea..wherever it takes me in the city.
i had the same problem as u last yr.. i used to live in kellyville.
basically i got the 615 or 617 express bus (t-way) from samantha riley to central, and then bus to unsw. on good days it will take 50mins to central. but the t-way buses operate only in peak hr. so 9am and 10am starts will be perfect. if u start later, i highly suggest not to take 610. takes bloody forever. just train it from seven hills to central.