Routing algorithms, 20-minute neighbourhoods and hills in Scottish towns

The Scottish government committed to support 20 minute neighbourhoods — but not all algorithms are equal, even the simplest ones. Scotland's particularly hilly towns present a challenge. How does the 20 minute neighbourhood profile change, in different Scottish towns, when the routing algorithm takes up/down hill walking into consideration? In her TICTeC 2024 presentation, Gala presents analysis on the accessibility (or lack thereof) to transportation and services in a number of Scottish towns, taking into consideration slower paces when walking uphill, downhill, and both uphill and downhill.