Through Lanes is a linear feature coded with the number of through lanes.
<div>​​A through lane carries traffic past a facility (intersecting road or non-residential driveway), regardless of length, as opposed to turning lanes or acceleration-deceleration lanes, which separate entering, exiting, or turning traffic from through traffic.</div><div><br /></div><div>Ramps located within grade-separated interchanges (in Texas, referred to as &quot;Grade Separated Connectors&quot;) are also considered through lanes.  </div><div><br /></div><div>Through Lanes are reported to the Federal Highway Administration (FHWA) annually in the Highway Performance Monitoring System (HPMS) report.</div><div><br /></div><div>Update frequency: <span style='font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;'>Quarterly</span></div><div>Source: Geospatial Roadway Inventory Database (GRID)</div><div>Security Level: Public</div>
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