Tag Archives

Archive of posts published in the category: Networks
Apr
23

Coronavirus bill would provide $114 billion to prop up faltering transportation networks

As states have expanded orders and advice to people to remain at home in an effort to slow the spread of the virus, the numbers of people traveling and buying tickets for planes and trains has slowed to a trickle. On Tuesday, the Transportation Security Administration reported a nearly 90 percent decline in passenger numbers compared to last year. Transit agencies across the country have described similar drop-offs in demand.

The provisions in the congressional deal are designed to ensure that businesses don’t go bankrupt or public agencies default on their debts before passenger numbers recover.

Some details in the $2 trillion legislation were still being finalized, but in a presentation Wednesday afternoon, Jeff Davis, a senior fellow at the Eno Center for Transportation, said he did not expect any changes to affect the final figures for transportation.

The bill is expected to pass the Senate on Wednesday before heading to the House.

About $50 billion would be available to airlines, which have suffered as governments have imposed restrictions on travel and passengers have canceled trips. Half of the money would come in the form of grants to ensure airline employees can continue to be paid, a provision that was a priority of labor unions and Democratic lawmakers.

Sara Nelson, president of the Association of Flight Attendants, said the money would protect hundreds of thousands of jobs.

“This is not a corporate bailout; it’s a rescue package for workers,” Nelson said in a statement.

In a letter to congressional leaders over the weekend, airline chief executives warned that if lawmakers didn’t make the grants available, “many of us will be forced to take draconian measures such as furloughs.”

Companies receiving the grants would be barred from furloughing workers until Sept. 30 and couldn’t issue dividends or buy back their stock until late 2021. They would also be required to maintain service levels into 2022.

Davis said those grants might be enough money to keep some airlines operating, but for those that need more help the legislation also includes $25 billion in loans.

The loans would be offered only to companies that the government believed would otherwise go out of business. Taxpayers would also take a stake in borrowers, allowing the public to benefit if the company’s stock price rose.

Air cargo companies could get as much as $8 billion in grants and loans, and another $3 billion in payroll grants would be available to airline support contractors.

Airports would see a further $10 billion in grants on the condition that they keep 90 percent of their staff employees until the end of the year.

The bill would provide $25 billion to transit agencies, the figure they had been seeking. The money could be used to pay to put personnel on administrative leave as agencies cut service, as well as to buy protective equipment and cover other costs.

Davis said the funding is structured in such a way that it is likely to especially benefit agencies in New York and Chicago,

Apr
2

bstabler/TransportationNetworks: Transportation Networks for Research

Transportation Networks is a networks repository for transportation research.

If you are developing algorithms in this field, you probably asked yourself
more than once: where can I get good data? The purpose of this site is to
provide an answer for this question! This site currently contains several examples
for the traffic assignment problem. Suggestions and additional data are always welcome.

Many of these networks are for studying the Traffic Assignment Problem, which is one of the most
basic problems in transportation research. Theoretical background can be found in
“The Traffic Assignment Problem – Models and Methods” by Michael Patriksson, VSP 1994,
as well as in many other references.

This repository is an update to Dr. Hillel Bar-Gera’s TNTP.
As of May 1, 2016, data updates will be made only here, and not in the original website.

Each individual network and related files is stored in a separate folder. There
are a number of ways to download the networks and related files:

  • Click on a file, click view as Raw, and then save the file
  • Clone the repository to your computer using the repository’s clone URL. This is done with a Git
    tool such as TortoiseGit. Cloning will download the
    entire repository to your computer.

There are two ways to add a network:

  • Fork the repo
    • Create a GitHub account if needed
    • Fork (copy) the repo to your account
    • Make changes such as adding a new folder and committing your data
    • Issue a pull request for us to review the changes and to merge your changes into the master
  • Create an issue, which will notify us. We will then reply to coordinate adding your network to the site.

Make sure to create a README in Markdown for your
addition as well. Take a look at some of the existing README files in the existing network folders to see what
is expected.

All data is currently donated. Data sets are for academic research purposes only.
Users are fully responsible for any results or conclusions obtained by using these data sets.
Users must indicate the source of any dataset they are using in any publication that relies
on any of the datasets provided in this web site. The Transportation Networks for Research team is not
responsible for the content of the data sets. Agencies, organizations, institutions and
individuals acknowledged in this web site for their contribution to the datasets are not
responsible for the content or the correctness of the datasets.

Transportation Networks for Research Core Team. Transportation Networks for Research. https://github.com/bstabler/TransportationNetworks. Accessed Month, Day, Year.

This repository is maintained by the Transportation Networks for Research Core Team. The current members are:

This effort is also associated with the TRB Network Modeling Committee. If you are interested in contributing in a more significant role, please get in touch. Thanks!

Any documented text-based format is acceptable. Please include a README.MD that describes the files,
conventions, fields names, etc. It is best to use formats that can be easily read in with technologies