Car Navigation Equipment is Unique ID 859 in the IAB Audience Taxonomy 1.1, in the Purchase Intent* branch under Purchase Intent* → Automotive Products → Automotive Parts and Accessories. Trillboards emits it on the bid request as a segtax=4 segment, the code every IAB-compliant DSP already reads, so a buyer already running "Car Navigation Equipment" elsewhere can point that strategy at DOOH screens without rewriting taxonomy. Over the most recent 30-day window the network logged 1 cohort observations tagged with this segment across the 29,000+ screens registered on our own network.
Trillboards inventory concentrates in Taxi Rideshare Tv, Convenience Store, Retail Other. Taxi Rideshare Tv is the largest category at 14,760 approved screens, average floor $2.88 CPM. Those are network-wide venue counts; add a venue filter to the line item to hold delivery to the surfaces you want.
Buying one or two tiers up captures more of the network and less of the segment; buying this leaf does the reverse. The OpenRTB payload carries every level of the chain, so a single bid request can be targeted at Car Navigation Equipment or at any node above it. Intent cohorts compress the consideration window. Lead with the offer and a clear call to action.