Commercial vehicles parked to create blind curve

There are two commercial gritting trucks that have been parked on the curve of High Acres (a purely residential street with no outlet) for at least two, nearly three months. If it was one truck or lower trucks, it would be less of an issue but two high trucks create a blind curve in both directions - our driveway is right behind them and we can't see ANYTHING coming from that direction. It is also especially bad during school run when many children are being walked to nearby primaries.

I've never seen anyone in the trucks so I don't know if they are linked to a nearby house or whether the company is simply using what it sees as available space. But someone is going to get hurt because they can't see what is coming and have been forced to take the curve wide to see around.