You need any directions inside IMH can ask me, i very familiar
with that place(go there very often).
From Hougang MRT, take bus 101 or 161 to IMH. 161 stops right
outside IMH while 101 stops opposite. 325 goes there too but takes
a longer time.
If you taking 43, alight opposite IMH there(1 stop before HG Avenue
4)and cross the overhead bridge, turn right after u come down from
overhead bridge and right again. Walk along the pedestrian walkway
and walk in from the small gate along Buangkok Green quite near the
bus stop and walk all the way straight along the footpath and you
will reach a road, walk straight and you will reach BLk 1 aka main
office of IMH, walk straight and turn right, u will reach Ren Ci
Blk8/9. Turn left you will reach SILRA.
Even if u r inside IMH, you wont get to see mentally ill patients
UNLESS you enter the wards, so its quite safe (Soccer field
exception)