No solid green light for left turn lane onto 64th ave

Concern: Signal Timing

Road you are travelling on: 14 street

Direction of Travel: South

Time of Day: AM Rush Hour

Describe Issue: There is always a build up of traffic turning left onto 64th Ave from 14th st due to the lack of a solid green light. Volume is minimal northbound on 14th st and plenty of opportunities to turn, but not possible as there's no solid green given.