The TxDOT SSWP focuses on rural two-lane, two-way highways that are less than 24 feet in paved surface width and have an ADT of at least 400 vehicles per day (vpd). This program involves the widening of on-system narrow roads, along with adding edgeline and centerline rumble strips to improve safety. Projects are evaluated and selected using total safety factor weights. A link to TxDOT’s Highway Safety Engineering Website (including information about SSWP) can be found in

Appendix F, Section 3 – External References (Reference 6)