The national average price of retail diesel slipped 2.6 cents to $2.851 a gallon last week, its first decline after three straight increases.

Eastern freight railroad Norfolk Southern Corp.’s first-quarter profit fell, while Kansas City Southern said its net income nearly doubled.

Transportation and logistics firm C.H. Robinson Worldwide said its first-quarter net income jumped 25.6% to $73 million or 42 cents a share, up from $58.1 million or 33 cents a year ago.

Canadian transportation firm TransForce Income Fund said Tuesday it earned C$20.9 million or 24 cents a share in the first quarter, down from C$22.1 million or 27 cents a year earlier.

Railroads Canadian National and Burlington Northern Santa Fe Corp. reported their first-quarter profits declined, even as revenue rose.

Third-party logistics company and freight broker Hub Group said late Thursday its first-quarter profit rose 25% to $11.4 million or 29 cents a share, from $9.1 million or 22 cents a share a year ago.

Union Pacific Corp., the nation’s largest freight railroad, said Thursday its first-quarter profit rose 24% to $386 million or $1.41 per share, from $311 million or $1.15 last year.

CSX Corp. late Tuesday reported that its first-quarter profit fell 2%, due to slower freight demand and a sluggish economy.

Canadian National Railway Co.’s 2,800 union conductors and yard workers began rotating strikes Wednesday after rejecting a proposed one-year contract, Bloomberg reported.