AI:UK feedback

Thanks to all the people I met today and will meet tomorrow, it feels like 50-80 of you! A scattering of notes:

- [ ] add a construction / roadworks filter
- [ ] **show turn restrictions**. Southbound near Balham station, there were no left turns not obvious at all
- [ ] **use Santander bikeshare OD data** to show benefits. calculate routes before/after, and look for use of newly quieted streets
- [ ] add census data for number of trips taken by different modes from an OA
- [ ] in the 15m tool, add housing price data. Who can afford to live near 15m cities? And breakdown categories of amenities more -- who can afford to go eat at the fancy cafe vs the greasy spoon?
- [ ] Bug near https://www.openstreetmap.org/way/5198722 in southwark. Stop north/south traffic. There are no shortcuts all the way to the left shown, but the cell doesn't split without a filter. Is it banned turns or something?
- [ ] Bug near https://www.openstreetmap.org/way/4333591 in islington. Shortcut even though I don't think the main road changes name. Why? False positive