A marked two-stage left-turn box lets you make a left turn as two separate crossings: cross straight to the designated box, turn to face the new direction, then wait for that direction's signal. It is not the ordinary bike box directly ahead of cars waiting at a red light.
That distinction matters before you enter the intersection. Do not borrow the entry timing for one type of box and apply it to the other.
Find the Waiting Space Before Entering
From your approach, identify the designated left-turn box, its arrows, the space to stop, and the route out for the second crossing. Green pavement by itself does not identify a two-stage turn. The bicycle signs and markings guide helps distinguish other spaces you may see nearby.
Follow the local signs and the signal intended for your movement. This method concerns an intersection with a designated facility on a right-hand-traffic street; it is not permission to invent a waiting area at every corner. Check that your e-bike is permitted on the route, too.
Cross, Turn, Then Wait Again
When the applicable signal permits your first movement, proceed straight across to the marked box. Enter only when the path and waiting space are available. Stop in the designated area, keeping the crosswalk and moving traffic lanes clear, and turn to face the direction you want to go.
Now treat the second leg as a new crossing. Wait for the applicable signal for that direction. The green that brought you across does not also authorize you to move sideways into crossing traffic.
Picture an imaginary intersection where you arrive traveling east and want to head north. The first movement takes you east to the designated waiting box. You stop and face north. Only the signal governing that northbound movement tells you when to make the second crossing. This is a sequence to recognize, not a claim about the layout of any particular street.
Do not rush a yellow light to complete the first leg. Once a permitted movement begins, keep watching for people crossing and vehicles turning across your path. Paint does not make those conflicts disappear.
Do Not Enter a Box You Cannot Use
If the box is full, its entrance is blocked, or the second exit is unclear, do not enter the intersection expecting to find somewhere to wait. Remain in a safe lawful position and choose a permitted alternative crossing. Reach it without cutting across moving traffic.
If a walking route is the alternative, use the designated pedestrian facilities and their signals where allowed. Do not turn a crowded crosswalk into an improvised bicycle waiting box.
On electric bikes, make the stop and change of direction deliberate; do not use assistance to rush from the first crossing into the second. For this turn, the essential check is simple: a clear designated space, the correct first signal, then a separate signal for the new direction.
