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US 29 is freeway north of MD 32 except possibly a few at-grade intersections. The freeway is proposed to extend south to MD 650, and I think an interchange is under construction at MD 216.

29 Columbia Town Center	EXIT 16A 32 EAST Fort Meade EXIT 16B 32 WEST Clarksville			EXIT 16A 32 EAST Fort Meade EXIT 16B 32 WEST Clarksville	29 Washington	cloverleaf
29	EXIT 17 Shaker Drive Seneca Drive			EXIT 17 Seneca Drive Shaker Drive	29 Washington	NW, NE road between
29 Baltimore	EXIT 18 Broken Land Pkwy Columbia Town Center Merriweather Post Pavilion			EXIT 18 Broken Land Pkwy Columbia Town Center Owen Brown	29 Washington	SW extended trumpet with NW, SE leaves and S-W flyover
29				Columbia Town Center	29
29	Gales Ln				29
29	Old Columbia Rd			Old Columbia Rd ???	29
29 Baltimore	EXIT 20A 175 EAST Jessup EXIT 20B Columbia Town Center			EXIT 20A 175 EAST Jessup EXIT 20B Columbia Town Center	29 Washington	cloverleaf
29	Diamondback Dr				29
29 Baltimore	EXIT 21A 108 EAST EXIT 21B 108 WEST Clarksville			EXIT 21A 108 EAST EXIT 21B 108 WEST Clarksville	29 Columbia Town Center	cloverleaf
29 70	EXIT 22 100 EAST 103 Glen Burnie			EXIT 22 100 EAST Glen Burnie	29	3Y
29 70				EXIT 23 103 St Johns Ln	29 Washington	diamond
29 70	EXIT 24A 40 EAST Ellicott City EXIT 24B 40 WEST			EXIT 24A 40 EAST Ellicott City EXIT 24B 40 WEST	29 Columbia	cloverleaf with E-S flyover
29 99	EXIT 25A 70 EAST Baltimore EXIT 25B 70 WEST Frederick			EXIT 25A 70 EAST Baltimore EXIT 25B 70 WEST Frederick	29 Columbia Washington	cloverleaf with E-S flyover I-70 exit 87
	Old Frederick Rd Rogers Avenue 99 HOWARD COUNTY CENTER FOR THE ARTS				29

Thanks to Brian ten Siethoff and Alex Nitzman for info.