Speed limit dual carriageway question?

[mickm6cmg]

Thanks, just felt 70mph flying past a T junction was unsafe, and wondered if there was a automatic speed limit at that point with a T junction. What i mean by that is for example where's theres street lighting then you know its 30mph.

Do you?There's 40's 50's 60's and 70's under street lights.Not forgetting 20's.