Atan's colleague on the moving train confidently deposits a key token pouch onto the L-arm of the drop-off pole. That key token in the pouch only allows one train, at any one time, the authority to travel from Woodlands to Bukit Timah.

To continue the train's journey from Bukit Timah to Tanjong Pagar Railway Station (Singapura), he needs to collect another key token pouch from Atan's upstretched hand.