Insufficient time for traffic signals

When coming over the A47 on the Broadland Northway, A1270, from the northern side of the city. This is an issue that happens only at night, every night/early hours of the morning, as a driver of an articulated vehicle I approach the traffic lights, which on approach will turn to green when no other vehicles are about. The traffic lights at the top of the slip road will follow the same sequence. However being an HGV these lights at the top of the slip leading to the westbound A47 will change back to red well before I could get over them. I’ve had to wait in excess of 4 minutes for a vehicle to trigger another set on this junction before my lights will turn green again. Due to the lack of vehicles around, I rarely stop now and others do the same here because they all know the situation. Please help and give us an extra 10 seconds on these slip road road lights. If I have come to the wrong place, would it be possible to forward to whom looks after. This has been an issue since activation and feel one night there could be an accident due to complacency. Kind regards

Peter