Originally Posted by
drhandsome
I-94 forms printed on dead trees are still used at land crossings as electronic record are currently only generated at sea and air points of entry.
If you have recently entered the US via VWP are still within your 90 days WT/WB then in my experience they will just re-admit you under the same entry. No form, no extra days, no stamp. Have done this several times in various places, WA><BC at Peace Arch, NY><ON at Niagra, CA><Mexico at San Ysidro all when I had flown into the US previously and had exited and was coming back in. No I94W at any of them.