I don't commute but last week I witnessed a close call; I was approaching a stop light with 2 cars in front already at the full stop, there was a guy on hardtail mtb on my right, riding on the sidewalk following the traffic. This intersection is at the bottom of a small hill, so he was approaching it pretty fast. I was watching him because I have to make the right turn; so this guy flew across and almost got T-bone by a car that coming from the left. I wondered he saw that big RED blinking hand sign.