What are trees with hanging purple blossoms along NC highways?

The trees with hanging purple blossoms along North Carolina highways are likely Eastern Redbud trees (Cercis canadensis) or Purple Robe Locust trees (Robinia pseudoacacia 'Purple Robe'). Eastern Redbuds bloom in early spring with vibrant pinkish-purple flowers, while Purple Robe Locusts feature fragrant purple flowers in clusters. Both species are popular for their striking blooms and are often planted for ornamental purposes in landscapes and along roadways.