Hi, a British perspective on th subject...
Over here, the police tend to only chase if there's a helicopter near by (in the vacinity I think you "guys" call it

(sorry, the language has made me laugh since the dukes of hazzard!)
In huddersfield they can have a chopper in the air in about 4.5 mins and then your screwed so if your gonna run, you have to be walking within 3 mins of the chase which means dumping whatever your on / in within that time frame - not good - if you can hide your vehicle and walk away its okay, but on the motorway its hard - I have only run twice - once on a bike, once in a car, the time on the bike I was pulled for a cracke number plate - it being a freinds bike I couldn't remember the number so the cops say's - you follow me to your hous - I'd given him a flase name and address cos i wasn't completely legal - I followed him to a roundabout, when he turned left - i went straight on and then to another roundabout to a public park, dumped the bike in some bushes and then walked home - which wasn't so bad.
The time in the car - I was on the motorway speeding, at 100mph, and overtook a cop, I took the next exit, killed the lights did a left, carried on past two more and then did a right a parked up in side street and waited 1.5 hrs before continuing.
Cops on R1's over here I guess is a publicity stunt, although if it is true, then most sportscar wannabeas had better look out - lets face it if your doing 130 - 140 mph - your gonna get nabbed!, I guess as far as bikers are concerned, the cops may be more understanding riding these things around, although I would imagine it depends what police force they are members of - in the north they are total wankers and wouldn;t understand if yopu hit a powerband and popped a wheelie, without meaning to.
I guess the only way nowadyas over her to not get caught is to be bloody careful and to keep your eyes open, unmarked cars are easy to spot, but not at 150mph + , and if your caught doing 100mph + you get banned form driving - I know!
Cheers
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Be Happy,
James