Close this search box.

Unexpected Costs: Travis County Roadway Sizing Analysis

Are you developing land in Travis County, Texas? You may be responsible for costs to improve bordering streets that are substandard. Here’s what you need to know.
Travis-County unexpected costs

If your development will generate more than 1,000 net new vehicle trips per day, you will be required to complete a Traffic Impact Analysis (TIA) in Travis County. One of the most significant components of the Travis County TIA is the Road Sizing Analysis for boundary streets, but this piece of the process can catch developers off guard financially if they’re not planning for it. Here’s what the code says and how it applies to you.

What does Travis County’s code say?

Section 482.202 of the Travis County Development Regulations Code requires any street that borders a proposed subdivision and will be used for access to be improved to at least minimum County standards. If improvements are necessary, sufficient right-of-way must be dedicated along the site frontage, and fiscal for the half of the roadway widening that abuts the development must be contributed to the overall cost of mitigations and improvements in the TIA.

When is a street “substandard?”

“Minimum County standards” are based on several factors including the roadway’s functional classification (e.g., local street, residential collector street, minor arterial street, etc.), the predicted average daily traffic by the development’s buildout year, and the roadway’s speed. Travis County uses the cross sections provided in the City of Austin’s Transportation Criteria Manual (TCM) to define the appropriate cross sections for boundary streets with these specific characteristics.

If, for example, a roadway with the volume and speed characteristics of a residential collector street has only 30 feet of pavement, no curbs or sidewalk, and 50 feet of right-of-way, the roadway is substandard and must be upgraded to provide 37 feet of pavement, curb and gutter, sidewalks, and ten additional feet of right-of-way in accordance with the TCM’s minimum requirements.

side-by-side comparison of a substandard street and one upgraded in accordance with the TCM

So, what am I responsible for?

The extent of the developer’s responsibility to improve a substandard street is determined by Travis County on a case-by-case basis. After all mitigations and improvements are proposed and the developer’s pro-rata share of the overall cost is determined as part of the TIA, Travis County can decide which mitigations and improvements will be constructed from the funds owed to the County and which will be part of a donation agreement.

Travis County may require the developer to widen the roadway if the total cost of the substandard street improvements is less than the developer’s pro-rata share and if it is in the best interest of the development and the local roadway network. If the roadway widening is not an immediate priority for the County, the developer will be responsible for dedicating the appropriate right-of-way along the site frontage and paying a “fee-in-lieu” that covers only the fraction of the widening and construction costs proportional to the development’s traffic impacts.

travis county cost breakdown

Learn More

Do you have questions about Travis County’s Road Sizing Analysis and what you should expect before starting your next project? We can help! Contact us today to speak with one of our experts.

Share this post

Share this post

Learn more
about our


Complete Streets graphic

The Future of Complete Streets is Here

Unmet access, safety, and sustainability goals endure even as emerging trends, new modes, and technologies are competing for street, curb, and sidewalk space.


You’ve been searching for a place like WGI. We look forward to meeting you soon.


Enter your zip code, and we’ll personalize your experience with local projects, office locations, team members, and more.

WGI's success starts with our Associates

WGI supports its associates with meaningful opportunities for growth, strong benefits and perks, while we work collaboratively with clients and co-consultants to shape and improve communities.

Our Team in Action

Join the Team

WGI is a dynamic organization with opportunities nationwide for engineers, land surveyors, landscape architects, environmental scientists, and architects.

Find a team member:

Let's talk about your next project.