Reason behind was like what some of the forum members here have
said.. By sounding the horn, This will then give the drivers
driving towards the parking bay to have ample warnings so that an
accident wont happened inside the interchange.. For of the
Interchange that have this practise is Tampines Interchange,
Hougang Int (Peak Hrs), Serangoon Int.. Pls note that in Tam and
Serangoon, it only happens to Single berths…