PNUM hard-coded and Vehicle table creation bug fix #946

Job	Run time
linux-64-py	5m 29s
Standard 2-Zone Example (SANDAG)	1h 13m 34s
random_seed_generation_test	3m 13s
Standard 1-Zone Example (MTC)	41m 18s
macOS	5m 21s
prototype_sandag_xborder	5m 36s
placeholder_psrc	47m 52s
win-64	6m 8s
prototype_mtc	50m 37s
placeholder_sandag	2h 26m 42s
prototype_marin	1m 35s
prototype_mwcog	49m 0s
Estimation Mode Unit Tests	7m 33s
placeholder_multiple_zone	10m 4s
prototype_mtc_extended	1h 17m 52s
production_semcog	6m 20s
develop-docbuild	0s
	8h 58m 14s

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