As a BrE speaker, my terminology is different, but when I call a breakdown firm, I have to say:
Hi, my name is XXXXX. My membership number is XXXXXX. My car has broken down. I am on the M25 (that is the name of a motorway), about a mile past Junction 12. Please come as quickly as possible.
My car has broken down on the A27 about halfway between Falmer and Lewes.
My car has broken down on Edburton Avenue, near the corner of Ditchling Rise.
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