allow protect columns in parking location choice #164

Job	Run time
linux-64-py3.10	4m 56s
estimation_mode_test	16m 11s
macOS	11m 21s
prototype_mtc	45m 55s
develop-docbuild	0s
win-64	10m 40s
placeholder_psrc	35m 38s
prototype_mtc	42m 59s
prototype_marin	1m 34s
random_seed_generation_test	2m 40s
prototype_psrc_in_development	3m 30s
prototype_mtc_extended	2h 12m 20s
placeholder_sandag	1h 58m 58s
prototype_sandag_xborder	4m 8s
production_semcog	5m 4s
prototype_mwcog	43m 35s
placeholder_multiple_zone	7m 26s
	8h 6m 55s

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