For the same reasons a lot of you guys mentioned (silaw sa owner jeeps, easier on eyes both for you and people in front, etc) I shut off my lights. Kung really heavy traffic pati na rin makina pag less than 1/4 tank, or 1/2 pag malayo ako sa destination. Put it in neutral and use handbrake para less strain din sa driver behind you.
yeap turn off the light if heavy traffic, unless your going to change lanes or mejo maluwag na.. if stop light, off lights then hand brake then relax muna