Difference between revisions of "STOPS (Simplified Trips-on-Project Software)"

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{{infobox
 
{{infobox
 
|title=Simplified Trips-on-Project Software
 
|title=Simplified Trips-on-Project Software
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|license=
 
|license=
 
|documentation=[https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-documentation-and-software www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-documentation-and-software]
 
|documentation=[https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-documentation-and-software www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-documentation-and-software]
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|data_in=
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|data_in=[[GTFS]], [[CTPP]], [[GIS]] shapefiles, travel time (.txt)
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|data_out=
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|data_out=ridership projections, VMT changes
 
|website=[https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software]
 
|website=[https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software]
 
}}
 
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"At their option, sponsors of [[New Starts]] and [[Small Starts]] projects may use a simplified method developed by [[FTA]] to quantify the measures used by FTA to evaluate and rate projects. STOPS is a limited implementation of the conventional [[Four-step travel model|“4-step” travel model]]. STOPS replaces the standard “trip generation” and “trip distribution” steps with the [[Census Transportation Planning Package]] (CTPP) – tabulations from the 2000 Census (and soon, the American Community Survey) to describe overall travel markets. It also replaces the traditional “coded” transit network with standard transit-services data in the [[General Transit Feed Specification]] (GTFS) format."<ref>https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software Accessed 13-November-2016</ref>
+
 
 +
The [[FTA]] released STOPS in 2013 to help agencies adapt to the new Final Rule on major capitol investment projects approved through [[New Starts]] and [[Small Starts]]. These cover many fixed guideway transit projects around the country. The rule specifies that applications for these projects require ridership forecasts for new lines, since mobility benefits are evaluated as new trips on the project, with a double weight given to transit dependent users<ref>FTA Major Capital Investment Projects New and Small Starts: Final Rule https://www.gpo.gov/fdsys/pkg/FR-2013-01-09/pdf/2012-31540.pdf</ref>. A component of the environmental benefit that is evaluated in the creation of a new line will includes changes to vehicle miles traveled (VMT). STOPS provides this information to help agencies offer it as part of their application for funding.
 +
 
 +
==How it works==
 +
===Four-step travel model===
 +
STOPS uses an altered [[four-step travel model]] to produce ridership and VMT estimates using zone-to-zone markets stratified by household vehicle ownership and a conventional mode-choice model to predict zone-to-zone transit travel.
 +
 
 +
Stops differs from four-steps models in a number of key ways:
 +
*STOPS replaces the trip-generation and trip-distribution components with worker-flow tabulations from the [[Census Transportation Planning Package]]
 +
(CTPP).
 +
*STOPS factors the worker flows to represent home-based work-trip patterns and to account for home-based non-work-trip patterns as well.
 +
*STOPS uses the transit trip attractions predicted in each zone for home-based travel to characterize the non-home-based travel market.
 +
*Trip patterns are scaled to different years using population and employment estimates.
 +
*Coded transit data is replaced with [[GTFS]] both for the current transit system and to represent proposed changes.
 +
*STOPS relies on zone-to-zone roadway times and distances derived from the regional travel model for both the current year and for future predictions. This takes the place of any direct representation of the roadway network or directly assigned automobile trips.
 +
*VMT changes are calculated by multiplying trips shifted from automobile to transit on a zone-to-zone basis by the specified zone-to-zone travel distance.
 +
*STOPS is calibrated for broad application, not for any specific region, as four-step models often are. STOPS adjusts to specific regions in application by calibrating based on:
 +
**total transit system boardings;
 +
**the share of CTPP worker flows to jobs in each subarea that is captured by transit; and,
 +
**daily number of boardings at individual stations on any existing fixed-guideway facilities.
 +
 
 +
===Implementation===
 +
Project staff can download STOPS from the FTA website and install it locally.
 +
 
 +
===Inputs===
 +
STOPS uses a number of inputs for to make its predictions. Some are pulled directly through the software, whereas others have to be added by the project technician.
 +
*[[Census Transportation Planning Products]] (CTPP) can be downloaded as a state bundle from the STOPS page on the FTA website.<ref> CTPP data for STOPS https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-data-census</ref>. This data provides population data, workflows, household automobile ownership, and mode-choice by zone.
 +
*[[GTFS]] data is provided by the local agency.
 +
*Zone-specific population and employment estimates for the year 2000, the current year and, if applicable, for one or more future years is pulled from the regional travel model.
 +
*Zone-to-zone roadway travel times and distances are pulled from the regional travel model.
 +
 
 +
==Evaluation==
 +
===Benefits===
 +
STOPS use of standardized data such as [[GTFS]] and [[CTPP]] makes it much easier to maintain consistency and therefore offer effective predictions across different metros. This is particularly true when metro specific adjustments are made. A comparison of STOPS predictions and observed ridership on 15 different systems found a near perfect match.<ref>FTA: An Overview of STOPS https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/STOPS.overview-web-final.pdf ''Accessed 12 February 2017''</ref>
 +
 
 +
STOPS is particularly helpful where regional models are not available because they do not adequately represent transit as differentiated from road usage. Even where regional models are available, STOPS offers a useful quality control option to view a second ridership forecast, and the FTA will always accept the numbers derived from a successful application of STOPS.
 +
 
 +
===Limitations===
 +
*STOPS is only available for evaluation of fixed guideway projects (because [[New Starts]] and [[Small Starts]] are only available for fixed guideway projects). It does not work for local buses or other roadway forecasts.
 +
*The [[CTPP]] data that STOPS relies on only offers routine weekday travel information, which looks at resident travel patters in the trip categories: home-based work, home-based non-work, and non-home based. This excludes special markets such as students or airport trips.
 +
*STOPS does not consider transit capacity. It does not adjust ridership forecasts based on limited capacity, and does not account for the benefits that a project can offer in relieving over-stressed transit capacity.
 +
*As of 2013, STOPS was using projections from CTPP info that was pulled from the 2000 census. There is a planned update to use ACS data to make it more current.
  
 
==References==
 
==References==
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* [https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software STOPS documentation and overview] from the Federal Transit Administration (FTA)
 
* [https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software STOPS documentation and overview] from the Federal Transit Administration (FTA)
 
* [http://tfresource.org/STOPS STOPS on the Travel Forecasting Resource wiki]
 
* [http://tfresource.org/STOPS STOPS on the Travel Forecasting Resource wiki]
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*FTA: An Overview of STOPS [https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/STOPS.overview-web-final.pdf https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/STOPS.overview-web-final.pdf]
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*FTA: An Overview of STOPS https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/STOPS.overview-web-final.pdf
−
 
 
 
[[Category:GTFS-consuming applications]]
 
[[Category:GTFS-consuming applications]]
 
[[Category:Ridership forecasting]]
 
[[Category:Ridership forecasting]]
 +
[[Category:Scenario planning tools]]

Latest revision as of 22:27, 6 April 2017

Simplified Trips-on-Project Software
Vendor FTA
Documentation www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-documentation-and-software
Data Input GTFS, CTPP, GIS shapefiles, travel time (.txt)
Data Output ridership projections, VMT changes
Website www.transit.dot.gov/funding/grant-programs/capital-investments/stops-%E2%80%93-fta%E2%80%99s-simplified-trips-project-software



The FTA released STOPS in 2013 to help agencies adapt to the new Final Rule on major capitol investment projects approved through New Starts and Small Starts. These cover many fixed guideway transit projects around the country. The rule specifies that applications for these projects require ridership forecasts for new lines, since mobility benefits are evaluated as new trips on the project, with a double weight given to transit dependent users[1]. A component of the environmental benefit that is evaluated in the creation of a new line will includes changes to vehicle miles traveled (VMT). STOPS provides this information to help agencies offer it as part of their application for funding.

How it works

Four-step travel model

STOPS uses an altered four-step travel model to produce ridership and VMT estimates using zone-to-zone markets stratified by household vehicle ownership and a conventional mode-choice model to predict zone-to-zone transit travel.

Stops differs from four-steps models in a number of key ways:

(CTPP).

  • STOPS factors the worker flows to represent home-based work-trip patterns and to account for home-based non-work-trip patterns as well.
  • STOPS uses the transit trip attractions predicted in each zone for home-based travel to characterize the non-home-based travel market.
  • Trip patterns are scaled to different years using population and employment estimates.
  • Coded transit data is replaced with GTFS both for the current transit system and to represent proposed changes.
  • STOPS relies on zone-to-zone roadway times and distances derived from the regional travel model for both the current year and for future predictions. This takes the place of any direct representation of the roadway network or directly assigned automobile trips.
  • VMT changes are calculated by multiplying trips shifted from automobile to transit on a zone-to-zone basis by the specified zone-to-zone travel distance.
  • STOPS is calibrated for broad application, not for any specific region, as four-step models often are. STOPS adjusts to specific regions in application by calibrating based on:
    • total transit system boardings;
    • the share of CTPP worker flows to jobs in each subarea that is captured by transit; and,
    • daily number of boardings at individual stations on any existing fixed-guideway facilities.

Implementation

Project staff can download STOPS from the FTA website and install it locally.

Inputs

STOPS uses a number of inputs for to make its predictions. Some are pulled directly through the software, whereas others have to be added by the project technician.

  • Census Transportation Planning Products (CTPP) can be downloaded as a state bundle from the STOPS page on the FTA website.[2]. This data provides population data, workflows, household automobile ownership, and mode-choice by zone.
  • GTFS data is provided by the local agency.
  • Zone-specific population and employment estimates for the year 2000, the current year and, if applicable, for one or more future years is pulled from the regional travel model.
  • Zone-to-zone roadway travel times and distances are pulled from the regional travel model.

Evaluation

Benefits

STOPS use of standardized data such as GTFS and CTPP makes it much easier to maintain consistency and therefore offer effective predictions across different metros. This is particularly true when metro specific adjustments are made. A comparison of STOPS predictions and observed ridership on 15 different systems found a near perfect match.[3]

STOPS is particularly helpful where regional models are not available because they do not adequately represent transit as differentiated from road usage. Even where regional models are available, STOPS offers a useful quality control option to view a second ridership forecast, and the FTA will always accept the numbers derived from a successful application of STOPS.

Limitations

  • STOPS is only available for evaluation of fixed guideway projects (because New Starts and Small Starts are only available for fixed guideway projects). It does not work for local buses or other roadway forecasts.
  • The CTPP data that STOPS relies on only offers routine weekday travel information, which looks at resident travel patters in the trip categories: home-based work, home-based non-work, and non-home based. This excludes special markets such as students or airport trips.
  • STOPS does not consider transit capacity. It does not adjust ridership forecasts based on limited capacity, and does not account for the benefits that a project can offer in relieving over-stressed transit capacity.
  • As of 2013, STOPS was using projections from CTPP info that was pulled from the 2000 census. There is a planned update to use ACS data to make it more current.

References

  1. ↑ FTA Major Capital Investment Projects New and Small Starts: Final Rule https://www.gpo.gov/fdsys/pkg/FR-2013-01-09/pdf/2012-31540.pdf
  2. ↑ CTPP data for STOPS https://www.transit.dot.gov/funding/grant-programs/capital-investments/stops-data-census
  3. ↑ FTA: An Overview of STOPS https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/STOPS.overview-web-final.pdf Accessed 12 February 2017

Further Reading

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