Kittel has ridden the route for stage one and stage two of the Tour de France but it is unclear which he declares as dangerous.
Stage one goes from Leeds to Harrogate and stage two is from York to Sheffield.
The German will be attempting to win the first stage as it ends with a sprint into Harrogate, but he will face tough competition with Mark Cavendish desperate to wear yellow for the first time in his career.
The 25 year old impressed last during last year's race as it was his first Tour de France and he managed to upset some of the bigger riders.
The Giant-Shimano rider wore the yellow jersey for the first two stages last year after he out-sprinted his rivals in stage one but he thinks the roads are dangerous this year so it might be harder.
Kittel said, according to Cycling Weekly: “I think the roads are in some parts very dangerous for a peloton of the Tour de France.
“On the descents when you ride through the more lonely roads in the middle of nowhere they are very narrow and very small with stone walls on both sides, so [when] a very nervous Tour de France peloton fighting for the yellow jersey passes by there can be a very dangerous situation.”
Kittel won a total of four stages in the 2013 Tour including the Champs-Elysees where he was too quick for Andre Greipel and Mark Cavendish.
Teams taking part in the Tour de France have been advised to look at the route in Britain before riding on it as it does provide a challenging ride.
A spokesman for Yorkshire's Grand Depart said: “[The stages] have been designed by the race organisers to provide a technical challenge to the peloton.
“We would encourage the other teams to recce the routes in advance so technically and tactically they are fully prepared.”
The first three stages will be in Britain this year giving the sprinters a chance to show off their skills in the early part of the three week tour, and with Cavendish missing the Giro to focus on the Tour de France, Kittel may be put under some pressure which didn't really happen last year.
The Tour starts on the 5th July and ends on the 27th July.
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