The sign you referred to is known as the "Parking warning sign left past." This traffic sign indicates that parking is allowed on the left side of the road after the sign. It serves as a warning to drivers that they should be cautious about the possibility of parked vehicles on that side.

When you see this sign, you should be aware that there might be vehicles parked on the left, which could cause reduced visibility or necessitate changes in your driving behavior, particularly if you are approaching a tight space or making a turn. Always keep an eye out for pedestrians or other road users who may be interacting with any parked vehicles.

If you have any additional questions about driving rules or other signs, feel free to ask!