Yup People walk through the railyard all the time in Portsmouth. Its a short cut from Bartlet Street to Maplewood.
Luckily it's a 10mph track so plenty of time to get out of the way I guess. I would love to walk it but wont as I am assuming its not legal even to walk alongside the track?
Am sure you have all seen this but I found this on YouTube yesterday.. fascinating history and insight into the Portsmouth Branch before abandonment.
https://www.youtube.com/watch?v=7ZDtoBh5KlU