Take your next left.

Come on, take the left.

It goes straight, then takes a left turn, which right now isn't that expensive.

Turn around.

Turn left, and there you are.

Target car is turning, left on Connecticut.

And let's make that lefthand turn.

The car cut to the left.

The car made a turn to the left.

The car turned to the left.

The car turned left.

My foot.

Take the next left at Lexington.

Jack, they're turning left.

Left at the third marker.

In this example here, let's now say that forward motion will cost you 1.

He broke his left arm.

Turn left now.

I'd broken my neck and my back in six places.

If it's a hash mark, we just keep our orientation the way it is.

I now command you to turn left.

Picture a car coming from here that wishes to go over here.

The path around this loop over here has a cost of 16, which is more than 15.

Gonna make a left after a big red mailbox.

I'm Bruce, I said, and promptly passed out.

Waited until it was just the right time, followed him very closely behind.

Now we're going to take the loop over here 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,11, 12, 13, 14, 15, 16.

Joan broke her left arm in the accident.

She fell down and broke her left leg.

These actions come with different costs.

Drive to the next intersection and make a left turn.

Tom broke his left ankle during a rugby match.

The path stays the same. I haven't punished left turns enough. Let me just try this.

Two stoplights down then left there's a way to the highway. Do you see it?

Laughlin, we're getting off this route. Turn left on 14th Street.

In fact, I should mention that parcel delivery services that plan for optimal routes of trucks like FedEx and UPS in the States, they actually plan routes that try to avoid left turns during rush hours, because it just takes much longer to do left turns.

With a cost of left turns this high, the left turn over here becomes prohibitively expensive, and we'd rather take a detour on the right side and do 3 right turns as opposed to 1 left turn.

It doesn't turn at all. That could be applied anywhere in the maze in any direction.

For example, if you go from go left to go up, that the same as turning right.

Suppose we punish left turns. Why would we do this?

Instead this vehicle goes straight, takes a left turn, which happens to be much cheaper than the lane shift.

Well, in real traffic, left turns are harder to do than the right turns. Often you have to wait for oncoming traffic.

If we add 1 we jump 1 up in the cyclic array over here, which is the same as doing a right turn.

Okay, let's slow down here to a stop in preparation for a lefthand turn.

The reason why I change the actions this way is for my next quiz.