Terms and acronyms commonly used in Transportation Planning are defined below.

A thru C | Cv thru F | G thru J | K thru M | N thru R | S thru Z

S thru Z
• SHRP – Strategic Highway Research Program (Program funded by the 1987 Transportation Authorization)
  
• SMP – Strategic Management Plan
  
• SPR – State Planning and Research
  
• STEP – Special Traffic Enforcement Program
  
• STIP – Statewide Transportation Improvement Plan
  
• STP – Surface Transportation Program (Federal funding category)
  
• TEA-21 – Transportation Equity Act for the 21st Century (Federal legislation)
  
• TFO – Traffic and Field Operations
• TIP – Transportation Improvement Program (5-year plan of projects from MPOs)
  
• TMG – Traffic Monitoring Guide
• TRB – Transportation Research Board
  
• USDOT – United States Department of Transportation