44 I ICT TODAY
The electronics and all connectivity for each RSU
unit along US33 is situated in a pole mount or ground
mounted ITS cabinet at the base of each pole (Figure 14).
Each ITS cabinet was connected to the Phase 1 and
Phase 2 singlemode micro cable by a smaller count fiber
cable (24 and 48-fiber strands). Multiple fiber pairs were
used through the ITS cabinets to provide a "daisy-chain
connectivity" sequence to protect the system from
complete coverage loss resulting from the failure
of any one RSU cabinet system.
The placement of the RSU poles was designed
to provide continuous wireless connectivity to test
vehicles on US33 from the US33/I-270 Interchange
to the TRC near East Liberty, with OBU radios using
Dedicated Short Range Communications (DSRC).
FIGURE 14: An RSU pole with ground mounted ITS cabinet.
CAV growth in the coming years
is expected to increase at a rate
of at least 25.2 percent annually.
