Is it possible to go through the Otay crossing as a pedestrian without taking any stair (e.g., in case of wheelchair or heavy luggage)?

Is it possible to go through the Otay crossing (one of three ports of entry (POE) in the San Diego–Tijuana metropolitan region) as a pedestrian without taking any stair (e.g., in case of wheelchair or heavy luggage)?
From what I recall last time I crossed there, I crossed a bridge (which goes over the cars queuing to enter Mexico) and went through some stairs to enter and exit the bridge. Is there some way around it?
Bridge:
View from bridge:
Stairs:
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