Traffic Signal Coordination at York & Harbour AND York at Lakeshore in Toronto

The traffic signals at York St & Harbour St and York St at Lakeshore Blvd, are coordinated in a way that reduces the chances for drivers to block these two intersections. These two intersections are closely spaced. Here's how they're coordinated/timed: First, at York & Harbour, the southbound leading left turn phase comes on (callable and extendable) and at York & Lakeshore, the northbound leading left turn phase comes on (fixed time) to clear traffic in between these two intersections. Both of these left turn phases terminate together at the same time. The southbound left turn phase is longer, so it starts a little before the northbound left turn phase. Then, northbound and southbound get a permissive green ball at both of these two intersections. The north/south green time finishes at York & Harbour a little sooner than York & Lakeshore. When the northbound lagging left turn phase comes on at York & Lakeshore, eastbound traffic at Harbour & York receive a leading left turn phase (callable and extendable). The maximum green time for the eastbound left turn phase at Harbour & York depends on how long the northbound lagging left turn phase is at York & Lakeshore, but the northbound lagging left turn phase is meant to clear northbound traffic coming from the eastbound left turn green arrow on Harbour St. When the northbound lagging left turn phase terminates at York & Lakeshore, the eastbound leading left turn phase at Harbour & York will stay on a little longer until that traffic queue is about to reach the York & Harbour intersection. Lastly, pedestrians at the north leg crosswalk at York & Harbour will get the walk signal while westbound traffic on Lakeshore at York gets the green light. Overall, I really like the way these intersections are coordinated to reduce times where drivers block intersections, especially with the long green time duration given to left turns at both intersections. After taking a closer look at how these signals are coordinated, I'm starting to think that the eastbound left turn green arrow should be fixed time with the maximum green arrow time each cycle. The reason I say that, is because if there's a long queue of eastbound traffic in the left turn lane approaching the Harbour & York intersection that didn't reach the detection zone to trigger the green arrow in time, or if the green arrow terminates early due to one driver leaving a 3 second gap in the left turn lane, pedestrians at the north leg will get the walk signal before the lagging left turn phase at York & Lakeshore terminates. Because it can cause eastbound drivers turning left from Harbour onto York to miss the lagging left turn phase, it would significantly increase the chances for those eastbound drivers to block the intersection, by increasing the number of drivers turning onto York from Harbour after the northbound lagging left turn phase at York & Lakeshore terminate.