maryland route 175 is a state highway in the u.s. state of maryland. the highway runs from little patuxent parkway in columbia east to md 3 in millersville. md 175 is a major highway through the large unincorporated community of columbia; the highway connects u.s. route 29 (us 29) next to columbia town center with interstate 95 (i-95) and an industrial area on the eastern side of howard county. md 175 also connects fort meade with jessup and odenton in western anne arundel county, where it links md 295 and md 32 with the eastern part of the u.s. army base.