Matt,
I'd have to lean toward Vehicle Crimes Squad for the V Crimes as well. I believe I have heard occasional references to a 'task force' by that name. Besides the fact that V Crimes is slotted under the Traffic header instead of Special Investigations, those unit numbers have a "T" prefix, like the rest of the traffic units. (There is a ph# listed for Vehicle Crimes squad on DPD's web page.)
GRANTS would be traffic units working overtime paid for with money received via a grant from other than City of Dallas funds (usually either state or federal funds). The most common is DWI enforcement, though there are occasionally other campaigns, such as seat belts or speeding enforcement near holidays.
ACCOUNT has to be accounting. But is that accounting as in budget, or crime stats, or both? Since it's in the the same group with other admin area's, could be either, or both. My pure guess is that it would be tilted more toward crime statistics.
SAFE was initially developed to deal with high-crime areas, largely appartment complexes. Many of these had out of state landlords, dis-interested onsite management, were not being kept up to code, non-working ac/heat, exposed wiring, active drug sales activity going on, burglaries, etc, etc. The initial SAFE teams were, if I recall, a combo of police officers, fire inspectors, and code inspectors. They would target a complex: the police working the crime issues; fire on fire code violations; building inspectors on their code violations. The criminal element would either be arrested, or move out to escape, leaving a few less drug houses, and a safer neighborhood. Fire inspectors would deal with their share of code vio;ations, as would the building inspectors. Either repairs would be made, giving residents a better place to live (hopefully with the crime reduced as well), or the complex could be forced to close & be boarded up, and/or eventually torn down.
SAFE, I believe, has pretty much been superceded by Operation Disruption. Op Disrup has the same basic purpose, concentrate on a high crime area, arresting as many drug dealers, burglars, whatever, as possible, makining the area too hot for the others to continue 'business as usual'. I think Op Disrup may be mostly a PD project, unlike SAFE. I don't recall any references to FD or Code Enforcement participation in it.