The story appears on

Page A4

December 8, 2012

GET this page in PDF

Free for subscribers

View shopping cart

Related News

Home » Metro » Public Services

Warning system to aid tunnel security

A WIRELESS warning system has been launched to prevent over-height vehicles from entering Jungong Road Tunnel and damaging signs and LED screens, reported yesterday.

More than 50 over-height vehicles have entered the tunnel area since it opened in January 2011, but most were stopped before entering the actual tunnel. In some cases vehicles went directly into the tunnel, causing severe losses by crashing into signboards and LED screens, said Yang Jinlong, manager of the tunnel's management department.

A group of sensors connected to the warning system have been installed about 2.2 kilometers from the tunnel along the Middle Ring Road to detect over-height vehicles.

"Once an over-height vehicle passes it will trigger a red LED warning sign 500 meters away and four sets of beepers, warning the driver to take the Zhoujiazui Road exit," said Zhang Weijia, who developed the system.

"The warning will also be sent to the tunnel management team so they can prepare for the possibility of the vehicle continuing to drive toward the tunnel. The alert will stop when the vehicle leaves the area," Zhang said.

Zhang said the management team would have 90 seconds to prepare for stopping the vehicle, assuming it was moving at 80 kilometers per hour.

"We will have enough time to deploy intercept actions. It is safer and more effective than the common practices of setting height limit rails and signboards, which leave only a few seconds for both drivers and the management team to react in an emergency," Zhang said.

Yang said the system will also improve traffic flow on the Middle Ring Road.


Copyright © 1999- Shanghai Daily. All rights reserved.Preferably viewed with Internet Explorer 8 or newer browsers.

沪公网安备 31010602000204号

Email this to your friend