The green arrow with restriction to bicycle traffic indicates that a vehicle is allowed to proceed in the direction of the green arrow, but only bicycles are permitted to go straight ahead. This means that while motor vehicles can turn in the direction of the arrow, they must yield to any bicycles traveling straight ahead. This sign is often found at intersections, and it's important for drivers to recognize that they can move but must do so with caution, ensuring the safety of cyclists. Always check for bicycles before proceeding when you see this sign.