Talking with some work colleagues today the phrase รถหวานเย็น came up, referring to very slow provincial buses that start and stop frequently. It is also used to describe 3rd class trains, as in รถไฟหวานเย็น When I asked how sweet and cold came to be associated with this nobody had a clue. I also asked if เย็น in this sense referred to evening or afternoon, and they said no. Anybody have any explanation for the origin of this?

Talking with some work colleagues today the phrase รถหวานเย็น came up, referring to very slow provincial buses that start and stop frequently. It is also used to describe 3rd class trains, as in รถไฟหวานเย็น When I asked how sweet and cold came to be associated with this nobody had a clue. I also asked if เย็น in this sense referred to evening or afternoon, and they said no. Anybody have any explanation for the origin of this?

It refers to an ice-cream type vehicle that stops at every house (to make a sell).

Talking with some work colleagues today the phrase รถหวานเย็น came up, referring to very slow provincial buses that start and stop frequently. It is also used to describe 3rd class trains, as in รถไฟหวานเย็น When I asked how sweet and cold came to be associated with this nobody had a clue. I also asked if เย็น in this sense referred to evening or afternoon, and they said no. Anybody have any explanation for the origin of this?

It refers to an ice-cream type vehicle that stops at every house (to make a sell).