A state's Highway Safety Plan (HSP) is different from its Strategic Highway Safety Plan (SHSP) in which key way?

1. They are the same document with different names
2. The HSP focuses on behavioral safety programs funded by NHTSA Section 402, while the SHSP is a broader statewide safety strategy covering all emphasis areas and funding sources
3. The HSP covers infrastructure while the SHSP covers enforcement
4. The SHSP is optional while the HSP is required