[LINK] Standards, please! The third coming of electric vehicles

[Martin Barry]

$quoted_author = "Ben Elliston" ;
> 
> As a last resort, in the air, we rely on TCAS.  If I recall correctly,
> pilots are always to follow TCAS and never the instructions of air
> traffic control in such situations.

Pilots always let TCAS overrule every other instruction, except when they
don't. 

http://en.wikipedia.org/wiki/2002_%C3%9Cberlingen_mid-air_collision

Marty