I always liked the idea of teleporters that are just wormhole pairs.

If you want to travel from New York to Paris you have to first go to your local wormhole station, walk through that and be taken to the central station for all US wormholes, walk over to the international portal and be taken to the global interface station, which would be located wherever the electricity is cheapest so probably somewhere in Iceland, then you walk over to the French national station, and be taken to some facility in France, and then from there walk over to the Paris wormhole.

All wormholes are 20 m across by standard allowing cargo containers to transport through, with the Americans have made system unnecessarily complicated by standardizing their wormholes to 2.5 giraffe widths.