Sound Ideas, TRUCK, HORN, AIR - TWO BLASTS 01

This sound effect can be found on the Series 1000 Sound Effects Library, which was made by Sound Ideas.

Clean, Full Length and Unedited Link to the Sound Effect

Angry Birds Toons (Heard once in a modulating pitch in "King of the Castle".)
Arthur (Heard once in "Meet Binky")
Beetlejuice
Bill Nye, the Science Guy (Heard once in "Garbage".)
Cars Toons (Heard once in "Unidentified Flying Mater".)
Chuggington (Used as Dunbar's horn.)
Clifford the Big Red Dog (1988) (Heard in "Clifford's Fun with Sounds".)
Dennis the Menace and Gnasher (2009) (Used for lorry horn in "Last Day of Summer".)
Doc McStuffins (Heard once in "Awesome Guy's Awesome Arm".)
Everybody Hates Chris (Heard once in "Everybody Hates a Part Time Job".)
Higglytown Heroes (Heard once in "Balloon-A-Palooza" and "Overnight Moose".)
Johnny and the Sprites (Heard once in "The Sprites Saves Grotto's Grove".)
KaBlam! (Heard once in "Dave: Son of Hercules".)
Kim Possible (Heard in a low pitch.)
Oh Noah! (Heard once in "Goodbye Kitty".)
The Penguins of Madagascar (Heard once in "Crown Fools".)
Rugrats
Stanley (Heard once in "I Scream for Ice Cream", "Stanley's Dinosaur Round-Up" and "Follow That Falcon!".)
Team Umizoomi (Heard in "Job Well Done".)
Thomas & Friends (Used as Derek, the Railway Foghorn, Mavis and Salty's horn. It is here where it is referred to by many as "The Derek Horn")
Thomas & Friends: All Engines Go (Used as Salty's horn.)
The Tofus
The Tom and Jerry Show (Heard once in "Molecular Breakup" and "Road Trippin'".)
The Mr. Men Show (Heard once in "Cars".)
Universal Basic Guys (Heard once in "Sunset Cruise".)
Woody Woodpecker (Heard once in "Time Warped".)

PC:

VTech V.Smile:

Thomas & Friends: Engines Working Together (Used in a low pitch as Diesel 10's horn.)

Australia:

UK and Ireland:

USA:

MajorEngineStudios
The MilanToon Channel (Used once as Salty's horn and commonly used as Dunbar's horn.)
Thomas1Edward2Henry3