Often when there is not much traffic at the intersection of Cheek-Sparger & Grapevine Hwy, the left turn arrow on the north bound left turn lane of Grapevine Hwy turning onto Mid-Cities Blvd. does not function at all! I have sat through 3 green lights waiting for the turn arrow that never arrived before getting out of the lane and going straight so I could do a U-turn to get back to Mid-Cities. I have also seen people get very frustrated and just go ahead and turn on the green but the left turn lane NEVER shows a green! This has happened to me 3 times so far in the last month & just happened again 5/10 around 8:30 p.m.