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1 change: 1 addition & 0 deletions docs/HighJax/HighJax environment.md
Original file line number Diff line number Diff line change
Expand Up @@ -171,3 +171,4 @@ Highway is inspired by HighwayEnv but has intentional simplifications for the JA
- **Reward post-crash zeroing** — Highway explicitly zeros the reward on post-crash timesteps. HighwayEnv continues computing the formula with `collision=1`, yielding a small positive value instead of exactly zero.
- **No on-road reward multiplier** — HighwayEnv multiplies the reward by an `on_road` flag (0 if vehicle is off-road). Highway omits this since vehicles rarely go off-road on a straight highway.
- **MOBIL distance approximation** — HighwayEnv uses exact pairwise lane distances for the MOBIL incentive calculation. Highway approximates follower-to-leader distance as the sum of ego-to-front and ego-to-rear distances, which is exact when vehicles are collinear in x.
# CI test
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