Livestock consume far more feed grains (mostly corn) than they produce food on their own [1]. The transportation costs to feed them are greater than the transportation costs would be if we were to feed humans on plant based foods, so transportation would actually be reduced if we lowered the amount of animal products we consume.

[1] http://news.cornell.edu/stories/1997/08/us-could-feed-800-mi...

That is a US-specific article. In the US, animal agriculture contributes about 2.8% of US total CO2eq emissions, whereas US transportation sector contributes 26%.

https://skepticalscience.com/animal-agriculture-meat-global-...

Not sure what your point is. I never said emissions related to animal agriculture outweigh total transportation emissions. What I said was reducing meat consumption would lower transportation emissions associated with food.

I wonder if corn were not subsidized to the extent it is, would alternative food sources grown on-site be more competitive, like grass?

Probably one of the problem with meat is too much water required for its processing which against has a processing cost.

The overlap is less than 2% of the total man made CO2 emissions.

Processing and transportation of animal products is 6% of the meat production emissions. Feed production also involves transportation, that would add maybe half of that (3%).