In roadside kiosk, ring FIRE, then HOSPITAL (9)

I believe the answer is:

tollbooth

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'in roadside kiosk' is the definition.
'tollbooth' can be an answer for 'kiosk' (tollbooth is a kind of kiosk). I am not certain of the 'in roadside' bit.

'ring fire then hospital' is the wordplay.
'ring' becomes 'toll' (ring a bell).
'fire then' becomes 'boot' (I've seen this in another clue. I am not sure about the 'then' bit.).
'hospital' becomes 'H' (abbreviation for hospital).
'toll'+'boot'+'h'='TOLLBOOTH'

Can you help me to learn more?

(Other definitions for tollbooth that I've seen before include "roadside kiosk" , "Kiosk for payments (to cross, eg, bridge)" .)

I've seen this clue in The Telegraph.

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