In so many cities there are drivers and transit users and pedestrians and cyclists and they are all at each others' throats. In other cities, people are multi-modal, using cars when it makes sense (like getting away for the weekend) and using transit, bikes or walking. Now Transport for London has recognized that their riders actually sometimes might walk, and has produced a map showing the walking times between stations. This is extremely clever, since transit maps like London's or New York's are wonders of graphic design but bear no relation to the reality. It should also be noted that Transport for London is already into being multimodal, since unlike most cities in North America, there are not separate jurisdictions covering each mode of transportation. They tell the Evening Standard:
Ary & Joe, did this in 2014 and it was very useful earlier this year during the tube strike. But now it is official.
What we have seen is that people are desperate for this sort of thing, so we have created it...It’s often quite a difficult message for us because people think we just do the Tube and buses, but we’re also responsible for roads, walking and cycling. We’re investing heavily in improving walking and cycling routes across London, with all the health benefits they bring.
It should also be noted how important a metric the distance between high capacity transit stations is for getting proper transit-oriented development. As the Institute for Transportation and Development Policy has noted,
The maximum recommended distance to the nearest high-capacity transit station for a transit- oriented development is defined as 1 kilometer, a 15- to 20- minute walk. Moreover, by building at higher densities closer to the transit station, a development can maximize the number of people and services that can easily be reached by a short walking distance.
Looking at this map of London and it's hard to find anywhere on it that doesn't meet that criterion, although this is only zone one and two. It would be interesting to see this done in other cities like New York or Toronto, but then you would have to get the transit people to talk to the road people, and they don't do that.