I meant to reply to this, Oliver, you are right, technically speaking, but Niall is right that in colloquial use traffic has evolved to mean motor traffic.
For example, if I said "There is a lot of traffic down my road" most people would think I meant motor vehicles, expect my flat to be noisy, and be surprised if they arrived at my flat to find our road is very quiet. Lots of people on bikes go past, but very few motor vehicles.
People don't say 'motor traffic' or 'pedestrian traffic' or 'cycle traffic' in spoken English. Language evolves, and you might not like the direction it evolves in, but the only certainty of language is change, and you can't control that. Take it from a linguist. =)
I meant to reply to this, Oliver, you are right, technically speaking, but Niall is right that in colloquial use traffic has evolved to mean motor traffic.
For example, if I said "There is a lot of traffic down my road" most people would think I meant motor vehicles, expect my flat to be noisy, and be surprised if they arrived at my flat to find our road is very quiet. Lots of people on bikes go past, but very few motor vehicles.
People don't say 'motor traffic' or 'pedestrian traffic' or 'cycle traffic' in spoken English. Language evolves, and you might not like the direction it evolves in, but the only certainty of language is change, and you can't control that. Take it from a linguist. =)