MEMPHIS, USA, Express Airlines I released passenger traffic figures for March 2001 today. During March, the regional airline carried 150,257 passengers, an increase of 52.3% over the same period last year. Revenue Passenger Miles (RPMs) grew 67% to 47,896,000 and Available Seat Miles (ASM's) expanded to 79,912,000 up 83.0%. Express Airlines I is a wholly owned subsidiary of Northwest Airlines doing...