ATA chief economist Bob Costello said: 'In March, and really the first quarter in total, tonnage was negatively impacted by bad winter storms throughout much of the US.
'While I expected tonnage to moderate in the first quarter, the late Easter holiday and the winter storms made it worse. It is likely that tonnage will improve in the second quarter, although year-over-year gains will be significantly below the 2018 annual increase of 6.7 per cent.'
Compared with March 2018, the SA index increased 1.6 per cent, down from February's 3.9 per cent gain. During the first quarter, tonnage was up 3.8 per cent from the same period in 2018, according to AJOT.