The safety issue is a delicate one. This week I've been along the section of busway that had 2 fatalities, both on a bus and cycling. This is between Hills Road and Long Road bridges on the section that can be seen from the train just south of Cambridge station.
I also don't know the legal details, that's between the Health and Safety Executive, the council, and their lawyers. But I can try to set out the long chain of events that are relevant. Some of them are a long time ago and it is difficult to check whether my memory is correct.
The original guided busway proposals were for a 55mph/90kph maximum speed specification. This was part of the case for the busway as an alternative to heavy rail.
At the outset there were no proposals for a cycleway/footpath next to the guideway, only an unsurfaced road for maintenance vehicles.
The busway opened 2 years late. During that period cyclists and pedestrians started to use the busway, both the maintenance road and the guideway itself. With skill and nerve it was possible to cycle on the guideway. I know because I have done it myself, as an experiment.
At some point a decision was made to surface the maintenance road and make it available to cyclists and pedestrians. At the time this was probably regarded as lower risk than the ad hoc use that had grown up during construction, and which was going to be difficult to stop. I can't remember whether surfacing the maintenance road contributed to the delay in opening.
The cycleways/footpaths are not very wide, along the section where the 2 fatalities occurred the width is less than 3 metres. In the early days the level of usage was not high, but grew rapidly, especially on the section where 2 fatalities occurred. This was driven mainly by the huge expansion in employment in the area around the station, and on the biomedical campus. This means that, at peak times, this section has heavy flows of cyclists and pedestrians in both directions. Two big residential developments also contributed to the rise in cycle and pedestrian traffic, at Clay Farm and Trumpington Meadows.
As the traffic on the cycleway/footpath was increasing, the buses continued to run on the guideway at 50mph/80kph, with only a kerb separating the guideway from the cycleway/footpath.
This week's cycle journey was mid morning, but I did have to overtake two pedestrians walking two abreast and someone with a child in a pushchair. Both of these took up about half the width of the cycleway/footpath, meaning that I could only overtake if there was no traffic coming the other way. The increasing use of cargo bikes has created another overtaking hazard.
Before the 2 fatalities on this section of the busway occurred, I had already made my own risk assessment and decided not to use that section of the busway for cycling at busy times. Generally speaking I only use that section of the busway on Sundays, when there are few people going to or from work.
The two major remedial actions that have been taken to manage risk are reducing the speed of the buses and installing a fence to separate the buses from the cyclists and pedestrians. I can't remember if the speed reduction to 30mph/50kph on this section of the busway came after the 2018 fatality or after the 2021 fatality. The northbound guideway, which is adjacent to the cycleway/footpath, was completely closed from January 2023 until April 2024 for the fence to be installed.
Should the council have acted sooner? It is a lot easier to say with hindsight than foresight.