Be careful entering and exiting the highway as anything from a motorbike to a triple road train could be doing 110 km/hr.
The Flinders Highway is particularly straight south of Woodstock around Crabb and Murray Road. This results from the highway following a runway used during World War II.
Read more at the sources below, the first one is the source of the background picture
Woodstock Airfield - 41 kms south of Townsville (ozatwar.com);
Place | Queensland WWII Historic Places (ww2places.qld.gov.au)
The cache is not at the listed coordinates.
To find the cache, locate the green World War II sign at the listed coordinates.
Ignoring the Roman numerals (II), use the remaining 5 words and 2 acronyms on both lines of the sign to work out the frequency of letters in the coordinates below
eg. there are 3 x d's on the sign, so d=3
19o d (a+t) . i q (d+f), 146o (t+f+t+c) y. t a (t+n+l+n)
Pilot your craft 700-800m due south down the tarmac to the calculated coordinates.
Replace the ligher green wire down through the wire curls.