Hmm, probably the safest means of overland travel in and around Baghdad was the 1974 datsun pickup, with the exhaust pipe barely clearing the road, being held up by a spool of baling wire, with serious dents/rust throughout the vehicle, with smoking exhaust like it needed a quart every hundred miles, with a goat tethered in the bed of the truck, doing about 10 kph below the speed limit down the freeway. No one ever messed with those rigs.
Personally, in a pursuit situation, I prefer the Cannonball run II version. 10 gallons of hi vis grease broadcast behind/to the side of the car by high pressure pumps and nozzles from under the car chassis. After they do a few spins at about 200 rpm, they won't feel much like pursuing I am guessing. Bike tires don't take kindly to zero friction coefficient...
It is also quite discreet, unlike flamethrowers, automatic fire, or a big cloud of Cap spray. Sadly, any innocents following behind might get caught in the mess and end up spinning out as well. Also, it won't do much for you if they get in front.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)