Cargo bikes?

I assume there are a variety of sizes and styles.

With inline wheels one can overhang a ramp a bit. With side-by-side wheels, it has to be a bit wider. I'd prefer about 4 feet, although 3 feet (1 meter-ish) might be a minimum.

Here are the ADA ramp requirements.

https://www.thebalancesmb.com/ada-ra...ruction-844440
https://www.adawheelchairramps.com/w...uidelines.aspx

They suggest 3 foot minimum width. Guard rails. And, a 1:12 maximum slope.