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HomeSafety- May 2019

Making Safe Left Turns
bike turns

Making a left turn in traffic, especially outside of a dedicated turning lane, can be a harrowing experience. Because cyclists traditionally stay to the right of a travel lane, turning left at an intersection often means turning in front of a car. But there are a few solid ways to responsibly make a left turn in traffic, and ensure drivers are aware they aren't the only ones on the road.

There are essentially 3 ways to make a left in traffic, which you use will come down to personal preference, traffic conditions, and your comfort level. We’ll start with the most common:

Vehicular Left

(standard left turn):

  • Check for a gap in traffic by scanning behind you
  • Signal your intention
  • Move into the leftmost lane or turn lane
  • Proceed through turn when clear
  • You did it!

We’ve all likely made this move a million times in cars,  and the same principles apply on the bike. Check over your shoulder for a safe opportunity to changelanes, signal, move over to the left, make your turn – done! The upsides to this turn are that it’s the most predictable (cars are looking for people going left from the left turn lane) and typically the fastest, especially if you’re hitting the intersection on a green light.

This is your standard left turn:

left turn main


But what if you have 
issues merging into traffic. The Box turn might feel like a safer alternative for you.

Box Turn Left

The box turn lets you make a left without leaving the right side of the road, perfect for riders uneasy to leave the shoulder. For this turn:

  • Stay to the right entering the intersection
  • Signal your intention to slow/move right
  • Stop at the front of the rightmost lane of cross traffic and wait for the light
  • Proceed straight across the intersection.
box l turn  

This is how many left turns work in cities with great bike infrastructure, utilizing advanced stop boxes to keep bikes from having to mix too intimately with 3,000lbs traffic. Essentially, you’re merging into the stopped through-traffic, waiting for the signal to change, and then proceeding straight through the intersection to “complete” your left. Even though we don’t have advanced stop boxes, just pulling into the front of the lane works (and if there’s a car there, pulling up in the crosswalk works too, just leave room for crossing peds). This turn is perfect for streets with heavy traffic or super wide lanes that might be tough to cross.

But what about when there’s a shared center turn lane or a left turn/thru lane and you don’t want to risk being stopped in the middle of thousands of pounds of moving metal? For you, let’s check out the U-turn option:

U-Turn Left

Being stationary on a bike in traffic is sketchy. Cars whizzing by, high differentials of speed, and no way to maneuver if something goes sideways. A bike in motion can avoid issues by steering, accelerating, braking, etc…, but if you’re not moving, you’re essentially just standing in the middle of the street and that’s where things get spooky. Check your local laws to make sure you’re in the clear for this one, but if I’m ever presented with a choice between my safety and blindly upholding a traffic law – I'll choose safety every time (and will keep doing so until the traffic laws are designed with bikes in mind). For situations where a vehicular left would mean standing still in a center turn lane and a box turn is out (for example, because because there’s no light for through traffic, it’s a t-interection, etc..) I’ll make a U-turn left: (#2 in the picture below)

  • Check for a gap in traffic
  • Signal
  • Move into the left most lane/the lane you’ll be turning from
  • Proceed carefully until there’s a gap in oncoming traffic
  • Signal and make a U-turn when clear
  • Make a right to complete your “left”
u turn left 

This left keeps you moving and essentially lets you “look for the gap” in traffic, as opposed to waiting for the gap to come to you. Just be sure to keep your heads up for oncoming cars entering the turn lane if it’s shared in both directions and, again, check your local laws if being on the right side of the rules is important to you.

And that’s it!

Personally, I use the standard vehicular left for  speed, ease, and predictability, but I know plenty of riders who prefer the box turn. Try ‘em out for yourself and see what’s right for you!