Bus 171 – Tower Transit Alexander Dennis Enviro500 (SMB3522B) Bus 171 – Tower Transit Alexander Dennis Enviro500 (SMB3522B) Bus 171 – Tower Transit Alexander Dennis Enviro500 (SMB3522B)
17 May 2024 - 31 October 2025 Bus Service Diversion for Early Closure of Jurong West Avenue 4 for JRL Works