National Economic Research Associates: May 2000 report called Motors and Modems Revisited. Among the findings:

• Virtual journeys using technology can reduce growth in traffic congestion on the real highway by up to 45%
• Nightmare traffic congestion could be avoided if drivers traveled by modem instead of motor
• Within 5 years:
  • telecommuting could cut commuter traffic by up to 10%
  • video and audio conferencing could cut business travel by up to 3%
  • the use of information technology could cut motor vehicle journeys by up to 16%
  • teleshopping could reduce car trips to the shops by up to 5%