Complex sentence: Bukit Panjang is a quiet town compared to some of the older housing estates such as Toa Payoh, Ang Mo Kio and other more publicly discussed towns but it has some major housing development under way.
Split into simpler sentences: Bukit Panjang is a quieter town compared to older housing estates such as Toa Payoh and Ang Mo Kio. Compared to more publicly discussed towns, Bukit Panjang is a quiet town but with major housing developments under way.