If i'm on Broadway in Somerville (Foodmaster is on my right) and I'm in the left lane making a left onto Rt 16/Alewife brook pkwy I have a green light. However oncoming traffic seems to be stopped - I think they have a red but I can't see. I feel like I should have a left arrow and not a green light. I feel like I need something that tells me that the oncoming traffic can't to - so I won't be hit.