You're overthinking this. According to my L ongman, the former is used in AmEng, the latter in BrEng. That's all there is to it.
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That's all there is to it.
According to my Longman, the former is used in AmEng, the latter in BrEng.
MUSCOVITE'ramp' vs 'slip road'I've never heard the term 'slip road'.
dave_anonif you're not going up or down, that's not a rampOn-ramps and off-ramps (AmE) need not have any slope. They can be perfectly flat. Yet they are ramps.
dave_anonOK, I won't argue undulyYou already have by even bringing it up. I explained the usage in American English, and you seem to be saying it can't be correct. It is irrelevant how strange it sounds to you. Consider that 'slip road' sounds strange to American speakers and no one posted to say how wrong that must be, and how if it's a slip road it must