Been following this with interest . . . why when this was designed did it create the charge only for entering the CRZ, rather than driving within it? While I realize it's a relatively small population (vs. all of NYC) it means people within the CRZ can drive wherever within it for free, which somewhat undermines the objective of congestion relief. Presumably there could be readers positioned at various other streets that would ensure most drivers inside the CRZ were tolled.