Advertising billboard size 5×4 m. with embed lighting that made it stunning day and night which located in 251 locations nationwide. 

Central 62 locations 

Traveler 24,478,436 people
Population 17,018,869 people

Bangkok (7) 
Phitsanulok (12)
Phra Nakhon Si Ayutthaya (11)
Nakhon Sawan (4)
Nakhon Pathom (5)
Nonthaburi (2)
Pathum Thani (2)
Saraburi (1)
Suphan Buri (6) 
Samut Sakhon (2)
Phetchabun (1)
Kamphaeng Phet (1) 
Chai Nat (2)
Lop Buri (3)
Sukhothai (2)
Ang Thong (1)

Eastern 26 locations  

Traveler 9,597,995 people
Population 4,744,000 people

Chon Buri (13)
Rayong (4)
Chanthaburi (3) 
Chachoengsao (1)
Sa Kaeo (2)
Prachin Buri (3)

Northeastern 71 Locations 

Traveler 10,860,721 people
Population 21,989,477 people

Khon Kaen (14)
Nakhon Ratchasima (14) 
Ubon Ratchathani (11)
Udon Thani (11)
Maha Sarakham (3) 
Buri Ram (2)
Roi Et (4)
Si Sa Ket (5)
Sakon Nakhon (2) 
Chaiyaphum (1)
Kalasin (1)
Surin (2)
Amnat Charoen (1)

Northern 31 Locations

Traveler 9,880,035 people
Population 12,098,164 people

Chiang Mai (21)
Chiang Rai (6)
Lampang (2)
Phrae (1)
Uttaradit (1)

Southern 46 Locations 

Traveler 15,408,662 people
Population 9,399,578 people

Songkhla (9)
Nakhon Si Thammarat (9)
Surat Thani (12)
Phuket (6)
Krabi (3)
Trang (3)
Chumphon (1)
Phangnga (2)
Ranong (1)

Western 15 Locations

Traveler 7,433,598 people
Population 3,381,719 people

Kanchanaburi (6)
Ratchaburi (1)
Phetchaburi (6)
Tak (2)

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References:
Travelers statistic of Jan-Mar 2018; Ministry of tourism & sports
Population of 2017; National statistical office