Spectrum 900 MHz licenses: 6-7 MHz in 80% of US:

In the LMS-M
Intelligent Transportation System Radio Service 
(the wide-area “sister” ITS service to DSRC 5.9 GHz):
904-909.75 MHz, 927.75-928 MHz.
For ITS location, data, voice. PMRS. FCC Part 90.

In the MAS service:
930, 940, 950 MHz. In much of US. Narrowband.
For mobile, fixed, data, voice. PMRS / CMRS. Part 101.

200 MHz licenses: 1-3 MHz in 80% of US:

In the AMTS & 220 MHz services:
217, 219, 220, 222 MHz. Mostly 500 kHz blocks, in pairs.
For mobile, fixed, data, voice.  P / CMRS. Parts 80, 90. 

VHF high band: 350 kHz in parts of US West:

In the inland VPC service:
157 / 162 MHz. 12.5 or 25 kHz channel pairs.
Daniels P25/ analog portable repeaters.
For mobile, fixed, data, voice.  PMRS, CMRS. Part 80.

Advantages for wide-area wireless of lower frequency in range-coverage (thus in cost, & time to build).
RURAL & urban underlay
URBAN & special rural
Short range