It could work but you’re definitely limiting your available hand positions, brake levers, and brake lever placement compared to a dirt drop bar. (Usually bullhorns like these use a bar end brake lever, that would eliminate the option of bar end shifters... possibly a cyclocross style brake lever mounted up further where the drop transitions upward).
[QUOTE="Grant, post: 1124886, ]
I can't imagine riding it. If you're looking for a short cockpit and an upright ride with a 90 degree sweep back, I'd think a northroad type handlebar would be a better choice. Or maybe a stache bar for a more "aggressive" position.