AKICIF: model car/javelin return system

First the set-up, then the questions... To see the photo I'm curious
about, either go directly to

or go to

and scroll down to the ninth picture.
The caption reads:
"A remote control car transports javelins back to the athletes,
keeping humans out of harm's way, during the first day of
competition at the Good Luck Beijing 2008 China Athletics Open
at the National Stadium, Thursday, May 22, 2008, in Beijing."
(Note: the eighth photo also shows some track-and-field javelins.)
My questions are:
(1) what if any real car is this a model of,
(2) can anyone make an educated guess at the scale, and
(3) given the approximate scale, is this likely to be an
off-the-shelf RC (remote control) model with a javelin rack added,
or something that had to be custom made because RC's don't come in
that scale (i.e., it's clearly too big to be Standard Size #1 but
too small to be Standard Size #2)?
-- wds