Green Square deserves a Green Square |WalkSydney

I wrote a piece for WalkSydney: Green Square deserves a (pedestrian-accessible) Green Square.

We have a high-frequency service train station. Across the street we have a Library. But we are not supposed to cross the street, as there is no intersection, no HAWK signal, no Zebra crossing, none of the animal menagerie designed to protect pedestrians from the onslaught of the more important motorised vehicles whose speed shall not be diminished. Casual empiricism suggests before the most recent installation of barricades walling off the library from its patrons, many people did, in fact, cross the street midblock in an organic but unorganised fashion, exhibiting the desire lines that ought to govern how the street system is arranged.

A Green Square. Drawn by Author. Not to Scale. Indicative Only. Zebra Crossing indicate location of pedestrian crossings. Refuge islands to be deleted, along with section of O'Riordan Street.

Green Pace – A Watch App to Save Time.

Look closely at the traffic lights. What could go wrong?
Look closely at the traffic lights. What could go wrong?

Imagine an Apple Watch app (Green Pace) that used haptic feedback to pace your walk so you made the “Walk” signal at every traffic light. It would tap faster if walking faster let you make the signal, it would tap slower if you would hit a “Don’t walk” signal anyway. This could save pedestrians perhaps 20% the time wasted standing on corners and breathing in fumes on each walk trip. What’s required for this?

Well, obviously a watch with haptic feedback. Such already exists.

More importantly, we would need a real-time advance feed of when traffic signal phases changed, and their control plan. This is more difficult, since so many signals are “adaptive” to real time traffic. Many however are fixed time and amenable to this. There are a few examples, but they are newsworthy, not widespread. This should be standardized.

We would also need some API that would read the standardized signal feeds and match them against a Directions/Map app, and GPS, on the watch.

So the most interesting thing here is that the simplest of these technologies (the traffic signal) is the last one to be implemented. We have satellites, we have computers on our wrists, we have wireless telecommunications, but we don’t know the timing of timed lightbulbs in most of the world.

 

 

NB: This traffic signal timing feed technology also has obvious applications for cars and trucks, which could speed up (potentially, subject to speed limits and prevailing traffic) or slow down (which is more interesting, as they can make a green wave by driving slower, and thus save energy and aggravation),  or re-route, if they knew the green lights in advance.

There are some traffic signal feeds out there, but I don’t see standardization, I see proprietary standards. Some articles from a quick search. Mostly related to the company Connected Signals.

Walking and Talking: The Effect of Smartphone Use and Group Conversation on Pedestrian Speed.

Camera Layout, Broadway study site

Recent working paper:

By testing the walking speed of groups of pedestrians and of phone users, followers of groups and of phone users, and of people uninfluenced by phone users and groups, from different sites it could been seen that groups of people and phone users, and often followers of phone users, walk significantly slower than people uninfluenced by phone. In a narrow path people in groups and phone users not only slow themselves down but also slow the people behind. The rise of the smartphone correlates with a reduction in walking speed.

When pushing the pedestrian button works and when it doesn’t | SMH

Nigel Gladstone of The Sydney Morning Herald answers: When pushing the pedestrian button works and when it doesn’t.

(The answer is it doesn’t work in the CBD during the day).

My quote:

Monetizing the beg button

Professor David Levinson from the School of Civil Engineering at the University of Sydney said traffic signals in the city should be shifted to be more pedestrian friendly to encourage more walking.

“Traffic signals give priority to motor vehicles over pedestrians. This inequality undermines many of the stated goals of transport, health and environment policy,” Professor Levinson said.

“Sydney uses adaptive signals so that they’re designed to maximise the throughput for cars and so they’ll extend the green light for cars but that results in there being more ‘don’t walk’ time for pedestrians.”

On the Four Paths

timeless
Photo by Jesse Vermeulen, posted at Unsplash.

First Path

In the beginning was the path. It was undifferentiated, shared by people and animals alike, and eventually wheeled vehicles pulled by humans and animals. While dating the First Path is impossible — the very first First Path must have been a path that was reused once, and slightly better than the unimproved space around it — it operated both in early settlements and on routes connecting nearby settlements.

Today’s version of that is the sidewalk or footpath. It is now used for people walking, sometimes for people moving goods, and occasionally for people on scooters and bicycles. It should not be used for storing cars, though it is. New uses will include low speed delivery robots, as shown in the photo from Starship.

When we see a raised crosswalk, we know the First Path is given the pre-eminance its venerable status warrants. When we see shared spaces, we know those harken back to the early undifferentiated path-spaces of earlier centuries. When we see pedestrian-only zones, we see a First Path that has grown up.

Starship
Starship Technologies

Second Path

The Second Path diverges from the first path with the emergence of the first street or roads with sidewalks (footpaths).  Spiro Kostof (1992) dates it to about 2000 BCE in Anatolia. And it is clear many Roman and Greek cities separated sidewalks from streets, which the Romans called Semita.

Post-Rome, sidewalks were rare, making appearances in London after the Great Fire, and in Paris after Haussman.

But to be clear, today’s sidewalk is not the second path, it is the first. The second path is the road which is largely free of pedestrians, intended for the movement of vehicles. Originally these were animal powered vehicles, as well as human. Later fuel-powered machines took over the street and roads.

camel
It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God.

Third Path

Cyclists Avenue Sydney Cyclists Avenue Sydney (1900)

The Third Path actually emerged well before the Second Path was colonized by motorized vehicles. It is for bicycles, and initially was paved in contrast with the unpaved streets and roads of its time. Given the first Velocipede was only 1817, and the first bike chain (which we associate with modern bicycles) was 1885, these came relatively quickly compared with the First and Second Paths. While ascertaining the first bike lane or separated bike path is tricky (there are many claims, differing in nuance), I have compiled some claimed firsts and earlies here (thanks to people who replied on Twitter):

While bike lanes have now been around as a technology for well more than a century, throughout most of North America and Australia, bike lanes are not provisioned, so bicyclists have the Hobson’s Choice of driving in traffic with much heavier and much faster automobiles and trucks on the Second Path, the roadbed or illegally in many cases on the First Path, the sidewalk.

With the advent of the smart phone, new modes are becoming feasible, most notably dockless shared bikes and scooters.

Regulations in many places limit the use of bikes on footpaths. The reasons for this are clear from the pedestrian’s point of view, bikes are traveling up to 4 times faster than walkers, and collision can create injury. Dockless shared bikes emerged in Australia in 2017, after a few years on the road in China. Their main contribution has however not been transport (they are used about once every 3 days) but instead as a the recipient of complaint about sidewalk clutter (unlike say cars, which are always parked perfectly). As a consequences they have been targets of vandalism. The obvious solution will eventually get adopted, geofenced corrals for parking bikes (shared and private), taking away one parking space per block perhaps.

Given the disparities of speeds on the first (5 km/h) and second paths (30-120 km/h), there is a clear market niche for an infrastructure network  for vehicles faster than foot and slower than cars. Physically, one imagines it generally lying between the existing kerb and removing a lane now devoted to the storage or movement of cars. And for many if not most urban places globally, this has been recognized and networks of third paths have been, or will be, built out.

This Third Path is important not just for bikes, but for electric bikes (which are becoming increasingly feasible with progress in battery technology) and electric scooters.

Fourth Path

A Fourth Path for buses (and other high occupancy vehicles) is also now considered. The first bus lane emerged in Chicago in 1940. The reason for bus lanes again is in part operational differences compared with existing road users. Buses start and stop in traffic much more frequently than cars. But a second reason is in fact the opposite, not because buses would block cars, but because cars would block buses. Buses carry more passengers than cars, and so should move faster, and can do so if they are not stuck in queues behind cars.

Interfaces

The Kerb – Once a nondescript piece of concrete now forms the edge (both physically and metaphorically) of the sharing economy: taxis, Ubers, autonomous mobility services. The Kerbspace differentiates and separates paths, but we now have new questions:

  • Who manages kerbspace? 
  • How is it regulated?
  • Is it even mapped?

Comp(l)ete Streets

The complete streets movement advocates for streets with sidewalks, bike paths, and are otherwise designed to promote safety and efficiency. The figure below is not exactly what they have in mind.

JusticiaUrbana
Justicia Urbana by Todorovic (https://www.flickr.com/photos/unhabitat/23003427510)

Evaluating the “Safety In Numbers” Effect With Estimated Pedestrian Activity

Recent working paper:

Pedestrian risk vs. PM pedestrian flow
Pedestrian risk vs. PM pedestrian flow

 

Pedestrian and bicyclist collision risk assessment offers a powerful and informative tool in urban planning applications, and can greatly serve to inform proper placement of improvements and treatment projects. However, sufficiently detailed data regarding pedestrian and bicycle activity are not readily available for many urban areas, and thus the activity levels and collision risk levels must be estimated. This study builds upon other current work by Murphy et al. (1) regarding pedestrian and bicycle activity estimation based on centrality and accessibility metrics, and extends the analysis techniques to estimation of pedestrian collision risk. The Safety In Numbers phenomenon, which refers to the observable effect that pedestrians become safer when there are more pedestrians present in a given area, i.e. that the individual per-pedestrian risk of a collision decreases with additional pedestrians, is a readily observed phenomenon that has been studied previously. The effect is investigated and observed in acquired traffic data, as well as estimated data, in Minneapolis, Minnesota.

“I Am Not Your Brother” – St. Paul Cops Allegedly Taser and Arrest Black Male for Sitting in Public Space (Video) | streets.mn

Cross-posted at streets.mn

Twin Cities Daily Planet brings our attention to this story: St. Paul cops allegedly taser and arrest black male for sitting in public space. City Pages provides some details: St. Paul police roughly arrest black man sitting in skyway

Note, this is hard to watch.

There are a number of transportation and land use and other aspects to this case which are worthy of discussion:

1. Do you have to identify yourself to the police? It depends. When driving yes – driving is a privilege. When walking (in Minnesota) no – “police can never compel you to identify yourself without reasonable suspicion to believe you’re involved in illegal activity.” Minnesota is not a stop and identify state, unless the police have “reasonable suspicion”. [1] [2] [3]

2. Is the skyway a public space? It is being patrolled by public workers (police), so apparently it is – though I am sure the law is vaguer than it should be – so the rights should be the same as on the street.

3. What are the details? The comment thread at TCDP suggests it starts near Caribou or Arby’s on the St. Paul Skyway System. He is going to New Horizons Day Care to pick up his child.

Officer1Officer2

4. What happened after the incident – Charges were dropped according to City Pages. Did the police apologize to the man in front of his child? Was this incident expunged from his record? Did the officers have reasonable suspicion justifying their actions?

5. In case it isn’t obvious, posting photos of police officers is legal. [1],[2]

Differences Between Walking and Bicycling Over Time: Implications for Performance Measurement

Recent working paper:

Schoner, J., Lindsey, G., and Levinson, D. (2014) Differences Between Walking and Bicycling Over Time:  Implications for Performance Measurement

Walking and Biking Mode Shares in summer 2001 vs. 2010
Walking and Biking Mode Shares in summer 2001 vs. 2010
  • Transportation policies and plans encourage non-motorized transportation and the establishment of performance measures to assess progress towards multi-modal system goals. Challenges in fostering walking and bicycling include the lack of data for measuring rates of walking and bicycling over time and differences in pedestrians and bicyclists and the trips they make. This paper analyzes travel behavior inventories conducted by the Metropolitan Council in the Minneapolis-St. Paul Metropolitan Area in 2001 and 2010 to illuminate differences walking and bicycling over time and illustrate the implications for performance measurement. We focus on the who, what, where, when, and why of non-motorized transportation: who pedestrians and bicyclists are, where they go and why, when they travel, and what factors are associated with the trips they make. Measured by summer mode share, walking and bicycling both increased during the decade, but the differences between the modes overshadow their similarities. Using descriptive statistics, hypothesis testing, and multinomial logistic models, we show that walkers are different than bicyclists, that walking trips are shorter and made for different purposes, that walking and bicycling trips differ seasonally, and that different factors are associated with the likelihoods of walking or bicycling. While the increase in mode share was greater for walking than bicycling, the percentage increase relative to 2001 share was greater for bicycling than walking. Both walking and bicycling remain mainly urban transportation options. Older age reduces the likelihood of biking trips more than walking trips, and biking remains gendered while walking is not. These differences call into question the common practice of treating nonmotorized transportation as a single mode. Managers can use these results to develop performance measures for tracking progress towards system goals in a way that addresses the unique and different needs of pedestrians and bicyclists.

You don’t have to live like a refugee | streets.mn

Pedestrian refuge island, London, preceding the onslaught of the motorcar (via Flickr)
Pedestrian refuge island, London, preceding the onslaught of the motorcar (via Flickr)

Listen, it don’t really matter to me baby

You believe what you want to believe

You see you don’t have to live like a refugee (Don’t have to live like a refugee)

Yeah Somewhere, somehow, somebody

Must have kicked you around some

Tell me, why you wanna lay there

Revel in your abandon

It don’t make no difference to me baby

Everybody’s had to fight to be free

You see you don’t have to live like a refugee (Don’t have to live like a refugee)

Now baby you don’t have to live like a refugee (Don’t have to live like a refugee) No!

Tom Petty & The Heartbreakers – Refugee Lyrics | MetroLyrics

I think Tom Petty speaks not of the oppressed living in third world conditions, but rather his girlfriend. The lyrics however apply to the pedestrian trapped on refuge island between two stream of traffic (perhaps this post should be Islands in the Stream – nah)

The pedestrian refuge island allows the pedestrian to cross some of the lanes of a roadway without crossing all of the lanes of a roadway. If the lanes are going in two directions, this might decrease the travel time to cross the street, by increasing the likelihood of finding a safe gap in traffic (since you are more likely to find an acceptable gap in fewer lanes than more lanes) and reduce the number of objects the pedestrian is looking for.

SPONTANEOUS ACCESS: REFLEXIONS ON DESIGNING CITIES AND TRANSPORT by David Levinson
SPONTANEOUS ACCESS: REFLEXIONS ON DESIGNING CITIES AND TRANSPORT by David Levinson

The refuge island is presumably a safety improvement (the evidence is that all else equal, it is: See, e.g. Retting et al. (2003) for a review of this and other crash counter-measures). However pedestrians with pedestrian refuge islands may also be more aggressive and ignore traffic control devices since there is a refuge only a few lanes away. (I have observed this to happen almost daily), particularly when lights are timed with long cycles (e.g. resulting in waits > 50s). It also adds to the total crossing distance, and potentially time if there are no cars (remember most roads are empty most of the time). But these effects are smaller than the main  safety benefit.

So far, so good – safety first and all. However, the existence of the refuge island makes it possible for the traffic engineer, and worse the driver, to even further subjugate the needs and rights of pedestrians. It creates an environment where the pedestrian must seek refuge from oncoming traffic (which implicitly has the right-of-way, rather one where the motor vehicles must yield to pedestrians who seek to cross.

Charlotte Complete Streets-Rozzelles Ferry Road  Charlotte completely revamped Rozzelles Ferry Road. The streetscape was enhance by the addition of street trees and planting strips, while pedestrian crossing opportunities--as indicated by the crosswalk and corresponding refuge median--were added along the length of the road to make walking a breeze. The bike lanes facilitate cycling on road that previously unsuitable for riding. Photo: Charmeck.org (via Flickr, Creative Commons license)
Charlotte Complete Streets-Rozzelles Ferry Road
“Charlotte completely revamped Rozzelles Ferry Road. The streetscape was enhance by the addition of street trees and planting strips, while pedestrian crossing opportunities–as indicated by the crosswalk and corresponding refuge median–were added along the length of the road to make walking a breeze. The bike lanes facilitate cycling on road that previously unsuitable for riding.”
Photo: Charmeck.org (via Flickr, Creative Commons license)

This is a problem of first best and second best. In a second best world, where pedestrians have no rights, this is the literal life-jacket being thrown to them so they don’t sink in the traffic stream. In a first best world, there would be no stream in which to sink. Life should not be a game of Frogger.

cross-posted at streets.mn