ADVISORY, May 9, 2008 (PRIME NEWSWIRE) --

 What:
 Manuel Sanchez, Chairman and Chief Executive Officer of Telvent GIT,
 S.A. (TLVT), will preside over the closing bell.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio

 When:
 Monday, May 12 at 4:00 p.m. EDT

 Contacts:
 Luis Manuel Quero
 (34) 902 33 55 99; luismanuel.quero@telvent.abengoa.com

 NASDAQ MarketSite:
 Jolene Libretto
 646.441.5220
 Jolene.Libretto@nasdaqomx.com

Feed Information:

The Closing Bell is available from 3:50 p.m. to 4:05 p.m. on uplink IA-6 C-band/transponder 17. The downlink frequency is 4040 Vertical; Audio 6.2-6.8. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Jolene Libretto at (646) 441-5220.

Radio Feed:

An audio transmission of the Closing Bell is also available from 3:50 p.m. to 4:05 p.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Waterfront fiber 1623 as well.

Webcast:

A live Webcast of the NASDAQ Closing Bell will be available at: http://www.nasdaq.com/about/marketsitetowervideo.asx

Photos:

To obtain a hi-resolution photograph of the Market Close, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market close of your choice.

About Telvent:

Telvent (Nasdaq:TLVT), the IT company for a sustainable and secure world, specializes in high value-added products, services and integrated solutions for the Energy, Transportation, Environment and Public Administration industry segments, as well as Global Services. Its innovative technology and client-proven expertise enable the efficient and secure real-time management of operational and business processes for industry-leading companies worldwide. (www.telvent.com)