A bit off topic to begin, but I hope it explains in context.
I could never figure out why Tranmere Vale was so called in the 19th centuary, or why it became Carnforth Street in the early part of the 20th. Carnforth St suffered bomb damage during WW2. The terraced housed were cleared and prefabs built in their place.
In the late 50's, the prefabs were demolished and two blocks of flats were built, to be called Carnforth Close, which bisected Carnforth St. No longer being a through road, the Oxton Rd end was renamed Cartmel Close. I think the Borough Rd end stayed as Carnforth St, although it was only a short cul-de-sac by then, with the 'Happy Valley' pub on the corner.
In the 1990's, the 1960's flats were demolished, to be replaced by modern flats. The name Carnforth Close has been retained. It starts in the same place, but instead of being parallel with Balls Rd East, it is now parallel with Borough Rd for a short distance.
Re: Roads in Tranmere Park
Following the logic of the list of roads quoted above - i.e. those north of Victoria Rd and Milton Rd are all named after trees - then Larch Rd and Sycamore Rd would seem to fit in. Elm Grove (extending from the top of Willmer Rd) was already making its way from Whetstone Lane to (the yet to be completed) Derby Rd. Perhaps Willmer was going to be named after a common tree, but ended up being named after a local dignatry.
Next: Some photographs (below).
They were all taken near the junction with Borough Rd. The one in the snow has been posted by me before, in a Borough Rd thread. Next shot is looking at the junction from the other way, as a 71a bus crosses in front of the launderette (which, in an earlier life, had been a grocers store where the Mantunna tea blend originated) and later became a car showroom.
In the third photo, looking down from a bedroom window, a number 6 bus turns right into Balls Rd East, on the Oxton Circle. Behind it is the printers.
On the skyline we have the 1960's flats on Carnforth Close.
(Sorry about the quality - I was barely able to get an image at all.)