Highway Signs - As enacted, requires the department of transportation to install signs or markers displaying language or an appropriate symbol indicating to motorists that a rest area or welcome center has an adult-sized changing table; requires the department to publish on its website the locations of rest areas and welcome centers that have an adult-sized changing table. - Amends TCA Title 4, Chapter 3; Title 12 and Title 54.

HB 1912 requires Tennessee's Department of Transportation to install signs or markers with a symbol indicating adult-sized changing tables at rest areas and welcome centers, and to publish these locations on its website. It directly affects motorists using these facilities, particularly parents or caregivers needing accessible changing options for infants or toddlers. The bill defines an "adult-sized changing table" as a height-adjustable platform in family restrooms and mandates that signs follow standard traffic control device guidelines. The law takes effect July 1, 2026, and applies to rest areas along state highways and interstates.