Estimated congestion on Texas roadways as identified by TxDOT's "Car Space" analysis model. Based on 2019 data.
<p style='line-height:normal'></p><p style='line-height:normal'><font size='3'><span style='font-family: Calibri, sans-serif; color: rgb(76, 76, 76);'>Quantifying
and communicating congestion on highways and local streets in Texas is
challenging.  A clear, replicable, and easily understandable method is
required to help manage, score, and evaluate planned projects in the
Transportation Planning and Programming Division.</span><span style='mso-bidi-font-size:
12.0pt;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;
mso-ansi-language:EN-US'></span></font></p>

<p style='line-height:normal'><span style='font-family: Calibri, sans-serif; font-size: medium;'>This
congestion calculation was performed using a method created by TxDOT referred
to as the ‘Car Space’ method. This method differs from other, more traditional
methods, by determining the space between cars in one mile increments. 
This method factors number of lanes, Annual Average Daily Traffic (AADT), and
average car length to calculate the space remaining between vehicles for each 1
mile segment of roadway during the 26th peak hour. The calculated space between
cars, or lack thereof, is categorized to illustrate levels of
congestion.  </span></p>

<p style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
line-height:12.95pt'></p><ul><li>Congested = less than 175' between cars<br /></li><li>Moderately Congested = between 175'
and 350' between cars<br /></li><li>Not Congested = greater than 350'
between cars<br /></li></ul><div>* This feature service contains fields for current and future congestion levels.</div><div><br /></div><div>Update Frequency: Annually </div>Security Level: Public
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