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Urban Analysis: Uber, Lyft are the largest contributors to the slowdown in S.F. Traffic



Statements released prior to the official publication of the report rejected the companies' belief that they were responsible for the deterioration in traffic conditions. Uber said the study was not responsible for a dramatic increase in tourism in recent years or traffic bottlenecks caused by more frequent cargo and e-commerce deliveries in the city. Lyft pointed to studies suggesting that TNCs could actually reduce congestion.

Results Add to 2017 Report

It is not exactly news that there are many Lyft and Uber vehicles in the streets of San Francisco. If you are in the financial district, in the south of the market (SOMA) or the mission and open the apps of companies, nearby traffic corridors seem to be crawling with travel service cars.

This impression is supported by data. SFCTA said in an analysis of TNC traffic last year that up to 6,000 Uber and Lyft vehicles were simultaneously on the streets of the city ̵

1; overshadowing the city's mostly moribund taxi fleet – and for about 170,000 vehicle rides on one typical weekday. This traffic service – again based on data from the end of 2016 – represented about 15 percent of all vehicle drives in the city, said the SFCTA.

"When we published this report, we revealed that there are a lot of TNC rides taking place, often in the congested parts of the city and often at the most congested times of day," said Joe Castiglione, deputy director of SFCTA for Technology, data and analysis.

"But we could not. I really say how many TNCs have contributed to congestion or how they could have changed the congestion since they started out about seven or eight years ago, because in the meantime, there are many other things "

Changes: the increase in employment in the city and the increase in population

" Surely all these new people – new residents and jobs – also contribute to congestion, "said Castiglione. "What this new report does is answer the question: how does the TNCs affect the congestion in San Francisco compared to all these other factors?" "

The SFCTA report confirms a plethora of unknowns in answering this question, noting that data on the impact of delivery, freight, and construction on urban roads are insufficient.

The study also acknowledges that For example, Uber and Lyft could encourage transit passengers by serving as a bridge to and from railway stations and bus stops.

SF roads: more delays, slower speeds

According to the Looking at data from various sources, transportation researchers concluded that the services actually constituted a significant factor in congestion.

Use of information on the activities of Uber and Lyft in San Francisco at the end of 2016, researchers at Northeastern University and Data about city-wide traffic conditions of Transport Intelligence Company INRIX, the SFCTA analyzed three measures of congestion: the extent of travel delays, the total number of miles vehicles in the city every day and average traffic speed.

The SFCTA says the daily daily traffic delays in San Francisco increased from about 65,000 hours in 2010 to 105,000 hours in late 2016. By analyzing different scenarios, including a hypothetical situation where there was no TNC traffic In 2016, the Agency estimates that 51 per cent of the additional 40,000 hours of daily delay are due to the transport services.

Simi The study found that the TNCs contributed greatly to increasing the number of vehicle miles driven on each day of the week and to reducing average speeds on city thoroughfares.

According to the SFCTA report, the number of kilometers traveled increased from 4.9 million to 5.6 million between 2010 and 2010, and by the end of 2016, with 47 percent of the 700,000-mile increase. City researchers estimate that the average speed on the city's roads fell from 24 mph to 20.9 mph over the course of the study, with traffic accounting for 55 percent of the 3.1 mph decline, highlighting the quarters and times of the day that the service companies operate have influenced the travel conditions the most.

Among these findings:

  • Driver companies contribute significantly to the horrendous traffic conditions in the city's financial district at SOMA, areas where delays and the number of vehicle miles driven have risen sharply.
  • The Mission District recorded the largest decline in average traffic speed – nearly 5 mph during the six-year study period. Smaller but significant declines were also recorded in the Financial District, SOMA and the Civic Center / Hayes Valley / Panhandle Corridor. The study states that travel services were the biggest contributor to speed reduction in these areas.
  • A SOMA block provides a dramatic example of both the deteriorating traffic congestion and the role of travel services companies. SFCTA says the daily delays on Bryant Street between 5th and 6th streets have more than doubled – an important approach for the eastern Bay Bridge. The agency says that 80 percent of this additional congestion is due to company cars.
  • The traffic delays have increased and the speeds have decreased at all times of the day. The report says the TNCs had the most dramatic relative impact on evening and night traffic when the city's average traffic speed dropped from about 26 mph to about 22 mph.
  • The data confirm that Valencia Street, often the site of the nightly TNC crowd, was badly affected by the advent of Lyft and Uber. The evening congestion on the popular Mission District Strip has skyrocketed, which is practically due to the service traffic. Lyft has tried to solve this problem by ending the transfers of people in Valencia between the 16th and 19th streets and taking the customers to side streets.

Castiglione and other SFCTA researchers who collaborated on the study are expected to present their findings to the Board of Supervisors – session as the County Transportation Authority Board – on Tuesday.

Uber and Lyft criticized the Agency's report, saying that the findings do not fully take into account other sources of congestion and certify no routes services may facilitate general travel.

"Although we appreciate the efforts to better understand the causes of bottlenecks, this study does not take into account critical factors such as the rise in tourism or the growth in cargo shipments that have exploded since the baseline of the study date of 2010," said Uber in a statement.

Lyft representative Lauren Alexander said via e-mail that the SFCTA report "is flawed and incomplete a picture of San Francisco's transiting challenges." Overloading is a complex problem, and Lyft commits itself to be part of the solution is ready to partner with SFCTA to promote solutions such as site prices and create more living space near the transit to eliminate the root causes of congestion. "

Lyft and Uber work together with a city on business trips, the proceeds of which should be used to finance transport improvements.


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