As a cyclist, I'm mainly disappointed that more isn't spent on maintaining the condition of the edge of roads. There's also the effect of utilities. Drains, gas pipes and electricity cables have to go somewhere, and it frequently seems that they go just where I want to ride.
As a motorist, my behaviour is constrained by the inadequate capacity of trunk roads and motorways.
We recently drove on a section of the M6, which was being 'upgraded' to a 'Smart Motorway'. That consists of putting some signs up, I did wonder why the work was scheduled for completion in March 2022. The work in Cheshire to the North has been working to a similar timescale, and has led to daily chaos.
Revenue from VED and fuel duty is about four times the expenditure on roads.