The best replacement for carriages is prams.

The best alternatives to carriages are rated as following:
★★★★★  prams
★★★  strollers
★  wagons

Your alternative for carriages is not listed? Suggest!
Speaking about carriages, one probably shouldn't forget about horses.

Other search terms related to carriages and their ratings are:
★★★★★ horses
You have in mind a companion for carriages and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of carriages in all years. Click on graph for more.
carriages
prams
strollers