For truck designs:
Modern Fleet – Clean wordmark with a subtle North Star above the "I" in Polaris. Minimal, easy to read from a distance.
Chrome Shield – Metallic silver and navy blue shield with a semi truck silhouette. Gives a premium, established carrier feel.
Compass North – Incorporate a compass rose and a highway that leads toward the Polaris (North Star), symbolizing reliability and direction.
Vintage American – Bold block lettering, stars, and stripes with a classic long-nose semi. Great for owner-operators.
Minimal Monogram – A sleek "PT" monogram with a star integrated into the letter "P." Excellent for uniforms and social media.
Mountain & Star – Mountains with the North Star above, representing strength, endurance, and long-haul trucking.

A color palette that works well:

Navy Blue + Silver + White (professional and premium)
Black + Gunmetal + Electric Blue (modern)
Forest Green + Gold + White (unique and memorable)
Red + Black + White (bold and high visibility)

If I were branding Polaris Trucking Inc., I'd go with a clean, Fortune-500-style identity: a bold silver wordmark, a subtle North Star, and a streamlined semi silhouette. It would look great on the side of a white Peterbilt, Kenworth, or Volvo tractor without feeling overly busy.