1/ A while ago I promised to write a thread about why zoning is not the only (maybe not even the main) obstacle between us and the 15-minutes city, starting from my grandmother "latteria".

Today I deliver : a thread about commerce, logistic and city planning. Image
2/ Let's first start with Granma's Latteria, that she opened in 1959. It was a small neighborhood shop, technically a "milk shop", but more of a small grocery + cheese shop + bar in a secondary residential street within a small cluster (tobacco, butcher and vegetable shop) Image
3/ It was a typical family business, run primarily by nonna Giovanna with occasional help from grandpa during weekends and by my father and my aunt after school, especially for home deliveries by foot or bike

Quite the typical portrait of a neighborhood shop in the postwar years
4/ But starting from the 1970-80s a different type of commercial structure became common: larger retailers and franchise opening supermarkets of 1000-2000 sqm in dense residential neighborhoods.
Like that Coop, we used to go when we were kids (with roof parking, lol) ImageImage
5/ It is nothing like zoning-imposed commercial strip box with large parking common in US at the time. Instead, the growing importance of large retailers (mostly cooperatives like Coop or Conad in Italy) pushed the planners to accomodate this new typology within the built city. Image
6/Another major transformation happened from the late 1980s: the arrival of French retailers on the Italian market, with ten years of experience in developing "hyper-markets" at home, pushed local retailers to join the rush to build giant "ipermercati", larger than 10,000 sqm Image
7/ Unlike in the US but like in France, those car-oriented ipermercati were essentially anchored to a large grocery retailer (10 to 15 k sqm), surrounded by a growingly franchise-dominated ancillary mall in a sea of parking at a major highway exit. ImageImage
8/ Ironically, the first one to open in Bologna, "Shopville Gran Reno", was inaugurated in 1993 by the main investor of the venture, a guy called Silvio Berlusconi, who announced in that occasion his will to enter the political arena.
A cursed place. Image
9/ In the following few years, 5 more opened around the ring expressway, all needing a negotiated amendment to the Plan to be accommodated. Political pressure and the promise of more taxes lured many cities, especially small peri-urban municipalities, to accomodate those giants. ImageImageImage
10/ It happened very quickly, in the matter of a decade. And as many people asked for policies to put a brake in those development that were quickly emptying out inner city shops, it was too little, too late (a very similar trajectory happened in France).
11/ Grandma retired in 1995, when her business was already suffering from this unbearable competition and her historical clientele was moving or passing away. She sold the business to a new owner, that retained the bar business only, but she too closed for good a few years later
12/ Since, all the small retailers in the same cluster closed one after the other. All but the tobacco shop, a regulated and protected activity. As you can see in the picture, two shops has been converted in ground floor apartments, considered more rentable. Image
13/ his case is hardly an exception: since the advent of large retailers, thousands of small neighborhood shops closed, many vacant spaces, even in the city center or new infill development, has been converted to homes, parking, offices,thanks to a quite loose land use regulation ImageImage
14/ Planning policies to "reinvent" the local shop have had mixed results. The tentative to bring the hyper-market+mall format within walkable dense neighborhoods has been largely a failure, as for this reuse of an old factory for commercial use in the mid 2000s: bankrupted. ImageImageImageImage
15/ A more positive trajectory has been observed for groceries, as many large retailers have since the mid-2000s started to come back to the city, opening small and medium size groceries in walkable neighborhoods as marges of growth for hyper-markets were getting thin. ImageImageImage
16/ The latest trend in retail is today the medium size grocery in the margin between the car and the walking city, often serving a mixed clientele of walkers, bikers and drivers. Still, suburban mostly car-oriented boxes are popping up for non-food franchises. ImageImage
17/ Finally, other very suburban and completely car oriented retail formats, like "shopping outlets", have popped up in the last twenty years in the middle of nowhere at motorways' exits, exploiting loopholes in the planning laws aimed at curbing further suburbanization of retail ImageImageImage
18/ All this happened within a context of quite loose land use regulations, that allow most small neighborhood shops to be easily opened everywhere by-right and slightly larger ones (up to 1,000-2,000 sqm) to be opened with a quite fast ad hoc procedure.
19/ In Italy, that deep transformation of retail from a family business in walkable neighborhood to a largely car-oriented activity has not been engineered by planners, but largely driven by market forces sometimes opposed, sometimes accompanied by planning regulations.
20/ Even parking minimums came in the game quite late, as an inadequate and naïve reaction to the negative effects of early car-oriented retail built within the walkable dense fabric, in a cultural context where the car is still often considered the default transportation mode.
21/ Behind the shift away from neighborhood shops there are economies of scale, consumers preferences, logistic contraints and other logics that strictly Euclidean land use alone cannot produce nor impede, as a whole lifestyle has been built around the Sunday shopping by car
22/Does that mean that planning has no faults? Of course not. Planners worked actively to accomodate cars in our cities. And US Euclidean land use zoning is dumb because of its rigidness and its incapacity to allow the city to adapt to changing social and economic conditions
23/But there is much more than zoning alone to "blame" for the likes of Grandma's shop sitting sadly empty for the last twenty years

A whole Copernican shift in how we produce, we transport, we sell, and we consume good has been at play.And planning tools alone cannot change it

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More from @ChittiMarco

18 May
1/ Québec just announced it is going to pour $10bn and counting in a what is now called the Réseau Express de la Capitale.
- $3.3bn will go toward the tramway project (20km)
- $6-7bn toward a 8km road tunnel (with bus lanes...)
- $600m for bus lanes and other improvements
2/ The tramway project is more or less the same announced a few years ago, albeit with a different Eastern terminus.
Unfortunately, the project lost the rest of the "Réseau Structurant" network it was part of, that comprised BRT, bus lanes too. But budget remained the same...
3/ $3.3bn for 20 km makes it $165m/km, one of the costliest tramways in history.

The average cost for Modern European Tramways Québec one is modeled from is around €30-40m/km
-> $50-70m/km

The short central tunnel section alone does not justify that astronomical budget, IMO
Read 7 tweets
7 May
1/ I've always been persuaded that most policymakers have little understanding of the spatial implications of their policies. That because policymaking is mostly dominated by discursive and econometric logics.

An example? Electric cars charging stations.

I will explain why
2/ With the next generation EU and Biden's infrastructure plan taking shape, the economic and environmental opportunities and trade-offs of electrifying cars have been discussed a lot in the public debate. Important resources have been committed to expand charging infrastructure
3/ But beyond energy and economy, there is an impact that has almost not been mentioned: where will this charging station be actually built? They won't exist in theory, out of our Euclidean space. They will need to make their space in a congested urban environment.
Read 8 tweets
6 May
One of Bari's suburban rails owned by FSE (Ferrovie del Sud-Est) has been finally completely wired and provided with SCMT (Positive Train Control). The new timetable is now a perfect 30 minutes clockface, albeit limited to a 5AM-9:30PM operation. It's a single track line ImageImage
We tend to overlook Puglia in the national transit discourse, but it's probably the only southern region outside Campania that has a decent transit network, an urban form conducive for transit (dense, compact towns) and actually invested in more service, not only new infra
The result is that Puglia is the only southern region that has seen a steady ridership increase in its local rail network: from 108k/day in 2011 to 150k/day in 2019 (+40%) while Sicily, a much larger region, is stuck at 45k/day and Campania plummeted by 44%, losing 200k/day Image
Read 5 tweets
4 May
1/ I see a lot of "terminological confusion" under the sun, when we talk about train service, especially in a cross-Atlantic comparative perspective
So, I did a quick, and uncomplete, chart to help us all talk about that more clearly.

Here it is, with a short explanation thread
2/ A topology of rail service is a complicate task, because rail services exists in a spectrum and not in watertight categories. But using the average speed/average station distance metrics we can identify a few large clusters of rail service types
3/ Starting from the bottom-left, we have the large family of suburban/regional rail service. Those are rail services targeting the daily mobility needs of an urban region, from commuting to everything else. Their average speed is relatively low and stop spacing close (<10km)
Read 12 tweets
4 May
Thanks to @BrendanDawe I discovered the Atlas of the French rail network published yearly by SNCF-Réseau (formerly RFF). There are a few interesting graphics about regional rail service intensity

Here is Paris (No RER A and B because RATP is another planet, not worth mapping :-)
Here is the whole country. France outside the Î-d-F confirms to be a bunch of provincial capital surrounded by the Great Nothingness :-P

And, of course, "La diagonal du vide (ferroviaire)"

Please note traffic generated by commuting to Luxembourg from the Meuse area (Metz/Nancy)
On the freight side, I'm surprised by the little numbers of daily trains. But I admit that freight is not my stuff, so I don't really know how these numbers compare to other corridors in EU or outside.
Read 4 tweets
3 May
1/ Official news are out that the money for metro rail in the Italian recovery fund will go toward a 11km extension of Catania's 🚇metro system.

Here is make a thread about a system that started its life not so well, but has a very good potential for the future.
2/ Catania's metro has long been the tiniest metro system in Italy, contending this not so enviable title with Genova. It's still the least used one, with some 20k/day users in 2019 (7M/year).

But what is the history behind a system that is atypical in the Italian context?
3/ Catania is a 300k city with some 7-800k inhabitants in a metropolitan area spreading along the Eastern coast of Sicily and on the fertile foothills of Etna, cultivated with wine, pistachios, oranges, lemons, prickly pears🤤 etc.
Read 14 tweets

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