Soi
It means "side street" in Thai, not soybean.
The photo above is the sign for Pattaya Beach Road Soi 4. The main road is called ``Thanon,'' and the narrow side streets leading from Tanon are called ``Soi.''
When referring to a specific area, people often use phrases like ``soi (numbers) set''.
<Example>
"Where is this shop?"
"It's on Soi 23 on Sukhumvit Road."