E.g. If your neighbour from the same block work at CBD area, you
guys can meet meet up and go to work in a car. 
Adv: Saves petrol $$$, less congestions
Dis: People whom you do not know at all.
My module chair and programme chair stay together at the
same block. So everyday they carpool and come to school. When going
back, they carpool back home also. 