correct veh type alts indexing #474

Job	Run time
linux-64-py3.10	4m 48s
estimation_mode_test	16m 3s
macOS	14m 38s
develop-docbuild	0s
prototype_mtc	41m 23s
win-64	9m 25s
prototype_arc	49m 8s
prototype_mtc	42m 41s
placeholder_psrc	35m 48s
prototype_psrc_in_development	3m 36s
random_seed_generation_test	2m 17s
prototype_marin	1m 27s
prototype_mtc_extended	1h 59m 26s
placeholder_sandag	1h 54m 31s
prototype_sandag_xborder	4m 4s
production_semcog	5m 13s
prototype_mwcog	44m 21s
placeholder_multiple_zone	7m 48s
	8h 36m 37s

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