The Strategic Transportation Investments (STI) Law (House Bill 817) allows NCDOT to maximize North Carolina’s existing transportation funding to enhance the state’s infrastructure and support economic growth, job creation and high quality of life. STI establishes the Strategic Mobility Formula, a new way of allocating available revenues based on data-driven scoring and local input.

STI Implementation Update

On March 31, 2014, NCDOT released the initial data for the approximately 1,300 highway projects in its current database based on criteria contained in STI. This data is subject to correction if errors are found, and is not a final list of projects that will be funded or programmed by NCDOT.

True to the law’s intent, this initial data shows that the department is working to better connect people to job, education, healthcare and recreation centers across North Carolina.

It is important to recognize that NCDOT does not have enough revenue available to complete all the projects analyzed through STI or meet all of the state’s transportation needs. Additional revenue must be secured to fully address the growing demands on our infrastructure, and working toward identifying and implementing potential funding solutions remains one of the department’s top priorities.

Using the STI Map

This map shows projects that have the potential to be funded, based on this initial data only. Click on the Layers menu in the blue menu bar and use the check boxes to filter views for the categories, which include:

  • Division Needs (134 projects funded using Division Needs funds **)
  • Regional Impact (93 projects funded using Regional Impact funds **)
  • Statewide Mobility (41 projects funded using Statewide Mobility funds **)
  • Transitional Projects (150 projects ** scheduled for construction before
    July 1, 2015 that are not subject to STI analysis)

With the cascading effect of STI legislation, a Statewide Mobility eligible project could be funded using Statewide Mobility funds, Regional Impact funds, or Division Needs funds. Similarly, a Regional Impact project could be funded using Regional Impact funds or Division Needs funds.

Check the STI Impact Areas box to see how these projects would benefit drivers not just in the immediate area, but also in surrounding communities. Change the background imagery with the Basemap menu.

**All projects shown on the map are subject to change, based on items such as corridor spending caps, federal and state funding restrictions, project readiness and completion of environmental planning. In addition, the STI legislation stipulates that certain types of projects will not compete under the Strategic Mobility Formula, including interstate maintenance, bridge replacements, highway safety improvements, and Congestion Mitigation and Air Quality projects. These projects will be prioritized separately under different criteria.**

View larger map

Next Steps

Data for nearly 500 newly submitted highway projects is expected to be released in May at the earliest. Local points will then be assigned for projects in the Regional Impact and Division Needs categories within 90 days after the remaining project data is released. Data for non-highway projects (which are analyzed separately, but will be considered along with highway projects under STI) will also be released at this time.

Why STI Is Important

North Carolina is the fourth fastest-growing state in the country. At the same time, NCDOT’s major revenue sources – including the state gas tax and federal fuel tax share, the Highway Use Tax and DMV fees – no longer provide enough funding to pay for all the transportation improvements North Carolina needs to continue to thrive.

STI will allow us to use our existing resources more efficiently and effectively, helping us move forward with important projects to enhance mobility and revitalize communities throughout the state. The new process encourages us to think from a statewide and regional perspective while also providing flexibility to address local needs.

How It Works

The Strategic Mobility Formula funds projects in three categories:

Division Needs Category

Projects in this category will receive 30% of the available revenue, shared equally over NCDOT’s 14 Transportation Divisions, which are groupings of local counties. Project scores will be based 50% on data and 50% on local rankings by area planning organizations and the NCDOT Transportation Divisions.

Highway projects in this category are analyzed according to three criteria:

  • Congestion (20%)
  • Benefit/Cost (20%)
  • Safety (10%)

Regional Impact Category

This category will receive 30% of available revenue. Projects on this level compete within regions made up of two NCDOT Transportation Divisions, with funding divided among the regions based on population. Data makes up 70% of the project scores in this category. Local rankings will account for the remaining 30%.

Highway projects in this category are analyzed according to four criteria:

  • Congestion (25%)
  • Benefit/Cost (25%)
  • Safety (10%)
  • Accessibility/Connectivity (10%)

Statewide Mobility Category

This category will receive 40% of available revenue. The project selection process will be based 100% on data.

Highway projects in this category are analyzed according to five criteria:

  • Congestion (30%)
  • Benefit/Cost (30%)
  • Economic Competitiveness (10%)
  • Safety (10%)
  • Multimodal, Freight and Military (20%))

STI scoring, weights and criteria were developed in 2013 by a broad-based group of transportation professionals and stakeholders, adopted by the N.C. Board of Transportation and reported to the N.C. General Assembly.

NOTE: Statewide Mobility projects are also analyzed separately in the Regional Impact and Division Needs categories and can cascade down to those categories for funding if they are not funded in the Statewide Category. Regional Impact projects can also cascade down to the Division Needs category.

A project’s benefit/cost can be improved if funding is provided during the project submission phase through local entity contributions or tolling approved by the local planning organization. In addition, a bonus allocation of up to 50% will be returned to the contributing area for a subsequent project scored through STI.

Alternate Criteria

To provide more flexibility, STI allows regions and divisions to develop alternate criteria tailored to their individual needs. To do so, the Metropolitan Planning Organizations, Rural Planning Organizations and NCDOT Divisions within the region must unanimously agree to the alternate criteria.

Regions made up of NCDOT Divisions 1 and 4 and Divisions 2 and 3 chose to utilize this option and developed alternate Regional Impact and Division Needs criteria.


These photos show Governor McCrory and other state leaders explaining the benefits of the Strategic Mobility Formula during the April 18 announcement.