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 a family restroom; requires the department to post on its website rest areas and welcome centers that have family restrooms. - Amends TCA Title 4, Chapter 3; Title 12 and Title 54.

SB 147 requires Tennessee's Department of Transportation to install clear signs or symbols at rest areas and welcome centers indicating where family restrooms are located. It defines a "family restroom" as a fully enclosed, lockable space designed to accommodate people with disabilities, elderly individuals, children, or those needing assistance. The bill also mandates that the department post a complete list of rest areas with family restrooms on its website. This affects travelers using Tennessee highways and directly requires the DOT to implement these accessibility features and transparency measures.