Reference Marker Maps
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These commonly requested maps show reference markers for each county in Texas and are used for a wide variety of purposes both inside and outside TxDOT.

A reference marker is a small green placard displaying a three-digit number that’s placed at intervals along all state-designated routes in Texas. Reference markers are used by TxDOT and the Texas Department of Public Safety as general reference points for identifying locations of vehicle incidents or roadway work.

This map series is produced annually following the publication of end-of-year data from the previous calendar year.

Each zip file contains multiple county-level maps within each TxDOT district.

TxDOT Reference Markers Maps

District ZIP
Abilene Abilene ZIP
Amarillo Amarillo ZIP
Atlanta Atlanta ZIP
Austin Austin ZIP
Beaumont Beaumont ZIP
Brownwood Brownwood ZIP
Bryan Bryan ZIP
Childress Childress ZIP
Corpus Christi Corpus Christi ZIP
Dallas Dallas ZIP
El Paso El Paso ZIP
Fort Worth Fort Worth ZIP
Houston Houston ZIP


District ZIP
Laredo Laredo ZIP
Lubbock Lubbock ZIP
Lufkin Lufkin ZIP
Odessa Odessa ZIP
Paris Paris ZIP
Pharr Pharr ZIP
San Angelo San Angelo ZIP
San Antonio San Antonio ZIP
Tyler Tyler ZIP
Waco Waco ZIP
Wichita Falls Wichita Falls ZIP
Yoakum Yoakum ZIP



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