Uhm, are we having a slight miscommunication here?
Are you mistaken about the service number because I swear that 198
does not hit Boon Lay Way at all except at the last part of its
route near Boon Lay Interchange? Which part of Clementi are you
referring to?
When it exits AYE, it goes via Jurong Town Hall Road until the
junction at Jurong East Ave 1, near Parc Oasis and then it
continues until Jurong West Ave 1.