Transportation
Planning

A long-range transportation plan (LRTP) is a federally required element for the Metropolitan Planning Organization and an Iowa state requirement for the Siouxland Regional Planning Association (SRTPA – RPA 4). The federal requirements for the MPO is outline in 23 CFR § 450.324.

The LRTP plays an important role in outlining the existing status and future needs of the MPO and SRTPA planning area’s transportation system. It helps set the direction of planning efforts and programming investments. The LRTP evaluates demographic, economic, passenger, and freight forecasts to understand how anticipated growth or decline will interact with expected land use to impact the demands on the transportation system. Through the development of the plan, stakeholder involvement and public input is requested to help guide priorities and projects that will be submitted for federal/state funding at the MPO/SRTPA level.

For both the MPO and SRTPA,  the LRTP is updated at least every fives years and has a planning horizon of 20 years.

In order to view any of these files, please download the latest version of Adobe Acrobat Reader.

Metropolitan Planning Organization (MPO) 

For the Sioux City Metropolitan Area (Iowa: Sioux City, Sergeant Bluff, Woodbury County, & Plymouth County, Nebraska: South Sioux City, Dakota City, & Dakota County; South Dakota: North Sioux City, Dakota Dunes, & Union County)

• SIMPCO Metropolitan Planning Organization (MPO) FINAL 2050 Long-Range Transportation Plan (Approved January 8, 2026)
  • Modifications:
    • Appendix C - February 2026

Siouxland Regional Transportation Planning Association (SRTPA)

For the Iowa counties with the Siouxland Regional Transportation Planning Association: Woodbury, Plymouth, Ida, Cherokee, and Monona.

• Siouxland Regional Transportation Planning Association (SRTPA) FINAL 2050 Long-Range Transportation Plan (Approved November 21, 2024)

Metropolitan Planning Organization (MPO)

For the Sioux City Metropolitan Area (Iowa: Sioux City, Sergeant Bluff, Woodbury County, & Plymouth County, Nebraska: South Sioux City, Dakota City, & Dakota County; South Dakota: North Sioux City, Dakota Dunes, & Union County)

It is the purpose of the MPO Transportation Improvement Program (TIP) to provide all citizens of the Metropolitan Planning Area, the FHWA, FTA, Iowa DOT, NDOR, and SDDOT with the Metropolitan Planning Area’s multimodal and intermodal transportation improvements for four fiscal years at a time.

Preparation of the TIP consists of compiling background information from the U.S. Census, U.S. DOT, Iowa DOT, NDOR, SDDOT, and other named sources. The MPO was responsible for preparing this TIP, with guidance from local and county officials, the MPO Transportation Technical Committee (TTC), the Policy Board, and citizen input.

The purpose of the Transportation Improvement Program (TIP) is to provide a structured, comprehensive outline of planned transportation improvements within the Metropolitan Planning Area.

The following is a list of updated Transportation Improvement Programs:

• FY 2027-2030 Transportation Improvement Program (FINAL)
• FY 2026-2029 Transportation Improvement Program (FINAL)
  • Amended Transit Table - 9.4.25
  • Amended Iowa TIP Table - 9.4.25
  • Amended South Dakota TIP Table - 9.4.25
  • Modification Nebraska TIP Table - 9.4.25
  • Amended Iowa TIP Table – 1.8.26
  • Modification Iowa TIP Table - 3.4.26
  • Amended Transit Table - 3.4.26 
  • Amended Transit Table - 5.21.26
  • Amended Iowa TIP Table - 5.21.26

MPO Iowa Surface Transportation Block Grant (STBG/CRP) Application (Due by February 6, 2026)

• FY 2030 MPO STBG/CRP Application / Iowa Members MPO
• Application Process

MPO Iowa Transportation Alternatives Set-Aside Program (TAP) Application (Due by February 6, 2026)

• FY 2030 MPO TAP Application Part A-F / Iowa Members MPO
• FY 2030 MPO TAP Application Part G / Iowa Members MPO
• FY 2030 MPO TAP Minority Impact Statement
• Application Process

FTA Section 5310: Enhanced Mobility of Seniors & Individuals with Disabilities (Due by February 13, 2026)

• 2026 Application for FTA Section 5310: Enhanced Mobility of Seniors & Individuals with Disabilities - South Dakota Members MPO

• Application Process

Siouxland Regional Transportation Planning Association (SRTPA)

For the Iowa counties with the Siouxland Regional Transportation Planning Association: Woodbury, Plymouth, Ida, Cherokee, and Monona.

It is the purpose of the SRTPA Transportation Improvement Program (TIP) to provide all citizens of the region, the FHWA, FTA, and Iowa DOT with the region’s multimodal and intermodal transportation improvements for four fiscal years at a time.

Preparation of the TIP consists of compiling background information provided through the U.S. Census, U.S. DOT, Iowa DOT, and other named sources. The region was responsible for the preparation of this TIP, with the guidance given by local and county officials, the SRTPA Transportation Advisory Committee (TAC), Policy Board, and citizen input.

The purpose of a TIP is to serve as an organized structure of information on improvements to be made in the region's transportation and related systems, addressing the region's future needs, goals, and objectives.

The following is a list of Transportation Improvement Programs:

• FY 2027-2030 Transportation Improvement Program (FINAL)
• FY 2026-2029 Transportation Improvement Program (FINAL - approved 6.26.25)
  
  • Amended TIP Table (9.25.25 & 11.20.25)

SRTPA Surface Transportation Block Grant (STBG) Application (Due by February 13, 2026)

• SRTPA STBG Application FY 2030 - Form – Iowa Members Only / Application Process

SRTPA Iowa Transportation Alternatives Set-Aside Program (TAP) Application (Due by February 13, 2026) – Iowa Members Only

• FY 2030 SRTPA TAP Application Part A-F
• FY 2030 SRTPA TAP Application Part G
• Application Process
• Minority Impact Statement

Metropolitan Planning Organization (MPO) 

For the Sioux City Metropolitan Area (Iowa: Sioux City, Sergeant Bluff, Woodbury County, & Plymouth County, Nebraska: South Sioux City, Dakota City, & Dakota County; South Dakota: North Sioux City, Dakota Dunes, & Union County)

It is the purpose of the MPO Transportation Planning Work Program (TPWP) to provide all citizens of the Metropolitan Planning Area, the FHWA, FTA, Iowa DOT, NDOR, and SDDOT with the MPO multimodal and intermodal transportation planning work program, including the objectives and budget for each fiscal year.

The purpose of a TPWP is to serve as a guiding document of information addressing current and projected transportation needs for the Metropolitan Planning Area from a planning perspective.

In order to view any of these files, please download the latest version of Adobe Acrobat Reader.

The following is the most recent Transportation Planning Work Program:

• FY 2026 MPO Transportation Planning Work Program (FINAL)
• FY 2027 MPO Transportation Planning Work Program (FINAL)

Siouxland Regional Transportation Planning Association (SRTPA) 

For the Iowa counties with the Siouxland Regional Transportation Planning Association: Woodbury, Plymouth, Ida, Cherokee, and Monona.

It is the purpose of the SRTPA Transportation Planning Work Program (TPWP) to provide all citizens of the Metropolitan Planning Area, the FHWA, FTA, and Iowa DOT with the RPA multimodal and intermodal transportation planning work program, including the objectives and budget for each fiscal year.

The purpose of a TPWP is to serve as a guiding document of information addressing current and projected transportation needs for the region from a planning perspective.

To view any of these files, please download the latest version of Adobe Acrobat Reader.

The following is the most recent Transportation Planning Work Program:

• FY 2026 SRTPA Transportation Planning Work Program (FINAL)
• FY 2027 SRTPA Transportation Planning Work Program (FINAL)

The Passenger Transportation Plan (PT) process is designed to promote joint, coordinated passenger transportation planning programs that further the development of the local and regional public transportation systems for SIMPCO’s MPO and SRTPA.  A prerequisite for state and federal funding, the PTP is structured under Iowa DOT guidelines, ongoing engagement with TAG, and standards for Coordinated Human Passenger Transportation planning as required through the Nebraska DOT and South Dakota DOT.

The PTP is compiled from collected public input assessing known and perceived transportation barriers for person without access to a personal vehicle.  SIMPCO’s TAG (Transportation Advisory Group) meets twice annually to review serves as available through public and private transportation providers, through collaboration with human services organizations, agencies, and program representatives.  Siouxland Regional Transit System (SRTS) and Sioux City Transit System (SCTS) are the public transit systems serving SIMPCO’s region.  Respective planning goals for the systems are based on finding included in the PTP and available and potential funding opportunities relative to each project.

The PTP undergoes a full update every five years.  Amendments are processed through SIMPCO’s MPO and SRTPA.

• FINAL FY 2025-2029 Passenger Transportation Plan (PTP)
• 8.20.24 – Proposed Amendments to the FY 2025 – 2029 PTP 

It is the purpose of the SIMPCO Transportation Public Participation Plan (PPP) to provide the citizens within the Sioux City Metropolitan Planning Area and within Woodbury, Plymouth, Cherokee, Ida, and Monona Counties an opportunity to voice their opinions and express their concerns about the transportation issues  in Siouxland.

SIMPCO and Siouxland Regional Transit System (SRTS) were responsible for the preparation of this PPP, with guidance given by local and county officials, the Metropolitan Planning Organization (MPO) Transportation Technical Committee (TTC), Siouxland Regional Transportation Planning Association (SRTPA) Transportation Advisory Committee (TAC),  MPO and SRTPA Policy Boards, SRTS Board of Directors Environmental/Cultural Agencies, interested parties, and citizens.

The information in this plan represents the first step in a continuing participation process that will be reviewed and modified annually. The purpose of a PPP is to serve as a guiding document to receive public input throughout the Siouxland Area.

In order to view any of these files, please download the latest version of Adobe Acrobat Reader.

• FINAL 2023 Public Participation Plan for the SIMPCO MPO/SRTPA/ SRTS

Please express any comments you may have about the MPO Public Participation Process by emailing us at simpco@simpco.org.

Intelligent Transportation Systems (ITS) Regional Architecture describes a plan for implementing ITS technologies to improve transportation system operations. The SIMPCO MPO ITS Architecture Plan was adopted in May 2005 and is updated on a five year cycle.

In order to view any of these files, please download the latest version of Adobe Acrobat Reader.

• Final ITS Architecture Report
• Appendix A
• Maintenance Plan

The National Environmental Policy Act (NEPA) was signed into law on January 1, 1970. NEPA requires federal agencies to assess the environmental effects of their proposed actions prior to making decisions. Siouxland Regional Transit System has met the NEPA process completed on October 7, 2019, on the facility housed with SIMPCO and SRTS employees. SRTS is situated on 5 acres in the Northeast corner of the Highway 75 and Highway 20 interchange, and that fronts along Hwy 20. Approximately 61 acres of the land is owned by Iowa DOT.

NEPA | Environmental Documents for the Siouxland Regional Transit Facility Operations and Bus Wash Facility Project