A motorcyclist was taken to a hospital on Friday in critical condition after he crashed into a highway barrier, San Antonio police said.Around noon, the 18-year-old man was seen on his motorcycle weaving in and out of traffic at high speeds near Callaghan Road on the Interstate 10 on-ramp on the North Side, an SAPD preliminary report said.The motorcyclist crashed into a center barrier and was thrown from the bike before coming to a stop, accordi…