This is a micro-sized cache placed near Addenbrooke's hospital, giving you a good view of part of this enormous site from the guided bus bridge over the railway.
It's on a cycle route, or a quarter of a mile's walk from the main hospital building, slightly less from the nearest car park. Be warned that while there is a road 100m away, there's no longer a convenient stopping point there. This road is only offically open to those having business at the hospital, use is monitored, and "repeat rat-runners" are liable for fines.
There is no need to go onto or across the busway to find the cache.
The CO also takes no responsibility if you miss an appointment through looking for this cache!
Congratulations to Plasadda for being first to find.