The Handbook gives a specific target for how far ahead to be looking on a freeway, and it is measured in time rather than distance. What is it?

Correct answer: A. Look ahead to where you will be in the next 15 to 20 seconds, or as far ahead as you can see

Where you will be in the next 15 to 20 seconds — or as far ahead as you can see, if the road does not let you look that far. Measuring in time rather than metres is the point: at 100 km/h, 20 seconds is well over half a kilometre, and at 50 km/h it is half of that, so the same instruction automatically scales with your speed. Looking that far ahead is what gives you time to notice brake lights well up the line, a lane closure, or a queue building, while you still have the option of easing off rather than braking hard. The same section adds a companion habit: "stay clear of large vehicles. Because of their size, they block your view more than other vehicles" — a truck directly ahead takes those 20 seconds away from you.

Source: MTO Driver's Handbook: Official MTO Driver's Handbook — Freeway driving, Driving along a freeway