Menu
DOOH advertising in public buses
Public buses on the Trillboards network reach captive commuter audiences in transit corridors during 15–45 minute ride sessions.
- 38
- Screens on the network
- $1.20
- Average floor CPM, USD per thousand impressions
- n/a
- Daily impressions per screen
- 2
- US cities
Audiences you can buy here
28 curated segments run on our transit inventory. Each is a live private marketplace deal, addressable from your DSP today.
What you are buying
Bus DOOH reaches the captive commuter audience in 15–45 minute ride sessions. The audience archetype is commuters and travelers in mixed-group composition; ride-share, telecom, financial services, and food-delivery advertisers see strong measured lift in this category.
- commuters
- travelers
- mixed group
Where the supply is
The five US cities carrying the most public buses on the network. Counts are aggregate, no per-screen identifiers are published.
- 1Long Beach, CA
- 2Key West, FL
Public buses in the DOOH ecosystem
Bus DOOH is one of the most attention-rich captive-audience categories, passengers in 15–45 minute ride sessions have limited alternative media (mobile data may be patchy in transit) and frequently look at vehicle screens. The Trillboards bus inventory is concentrated in Long Beach CA and Key West FL plus international bus markets. Floor CPM of $1.20 USD sits below network mean because public-transit advertising operates under more restrictive creative rules than indoor inventory, alcohol creatives are restricted in many jurisdictions, child-safety standards apply to all routes that include school adjacencies. Buyer demand concentrates in ride-share, telecom, food delivery, and financial services.
How the buy executes at public buses
Each screen runs the Trillboards kiosk app on an open OpenRTB 2.6 connection to our SSP. Roughly every 30 seconds, the device fires an ad request carrying the IAB DOOH inventory descriptor, venue category, location, screen format, plus the live audience measurements from the on-device CV pipeline.
Demand-side platforms bid in under 100 ms. The winning creative ships back, plays in the device's native VAST player, and confirms playback with a signed proof-of-play receipt. Those receipts reconcile daily against partner-reported numbers, which is the record we bill against.
We serve first-party and third-party VAST, OMID viewability where the creative declares it, and device-signed proof of play, meeting the OAAA measurement standards and the IAB DOOH 1.0 specification. Buyers on our OpenRTB endpoint target public buses through the IAB Audience Taxonomy and the Trillboards segtax=600 namespace, and receive no per-screen identifiers in the bid request.
If you own the venue
Public transit operators contract with Trillboards to host in-vehicle screens. The hardware ships pre-configured for moving-vehicle environments (ruggedized mount, vibration-tolerant) and operates over the bus’s onboard connectivity without operator intervention.
Where these numbers come from
Screen counts, floor CPM, daily impressions and city rankings are aggregated from the Trillboards PostgreSQL system of record (earner_screens, filtered to status = 'approved') joined to the venue taxonomy, snapshotted 2026-05-11 and rebuilt monthly. Floor CPM is the screen-level minimum; cleared CPMs typically run 20–40% higher with demand. Audience index, price and market count come from the live curated catalogue. This page publishes no per-screen, partner or device identifiers.