Some of F1's most experienced drivers have raised potential safety concerns over aspects of the new Baku street track, ahead of this weekend's inaugural race.

F1 arrived in the Azerbaijani capital for the first time on Thursday with drivers largely giving the 6km track, which winds round the city's streets, an enthusiastic thumbs-up.

Although cars do not take to the track until Friday, most drivers have already gone round by foot or bike to get a feel for the layout.

And Jenson Button, F1's most experienced driver and a director of the Grand Prix Drivers' Association, was surprised by the dearth of run-off areas in case of accidents.

"We have worked so hard on safety, improving circuits all the time, and then we come here and corners like turn three, turn seven, turn 14 don't have any run-off at all," the McLaren driver said.

Ahead of the European Grand Prix, Ted Kravitz heads to Azerbaijan to check out the Baku City Circuit and look at the changes being made to host the race Ahead of the European Grand Prix, Ted Kravitz heads to Azerbaijan to check out the Baku City Circuit and look at the changes being made to host the race

"Turn seven has three Tecpro barriers and then a concrete barrier at the edge of the circuit. There's not much you can really do because there's a building in the way. Hopefully they (the FIA) have done their tests, but Monaco has got a lot of run-off. This is a high-speed street circuit, it's not like Monaco."

Championship leader Nico Rosberg also expressed concern: "The track is great, the place is great, and all in all I'm sure it will be a great success.

The drivers' Baku impressions

"But a little bit of a concern with those run-offs. So that's not great and we need to see how it goes. There's corner 14, where there's a wall straight-on, turn three, and then the pit entry as well. So not fantastic."

Organisers have billed Baku as the fastest street circuit in the world with the pit straight one of the longest on the calendar. However, the entry to the pit lane has also under the spotlight. Coming off the high-speed main straight, drivers have to navigate a kink in the slip road and do not have to apply the pit-lane speed limiter until just before the pit lane begins.

"We never had a pit entry like this," said Williams veteran Felipe Massa.

The F1 drivers in Thursday's press conference try to out bid each other on how many laps they'll need before they learn the Baku Circuit The F1 drivers in Thursday's press conference try to out bid each other on how many laps they'll need before they learn the Baku Circuit

Asked about the pit-lane layout, Button added: "It's like we've gone backwards in certain areas, I don't know why. It's supposed to be the other way round.

"It's a shame because a lot of the circuit is good and you look at the condition of everything and it does look very good. I do like the layout, I think it's exciting in some places, but some things look like they need to be addressed.

European GP talking points

"We trust in the FIA and they do a fantastic job of keeping us safe. They really do. They have improved pretty much every circuit we go to, including Monaco, but, after running round here, certain corners look like there's not a lot of run-off."

Not all drivers were as concerned, however, with world champion Lewis Hamilton pointing out one section of the track where he feels there is too much escape road.

Although acknowledging he had not walked the full track, Hamilton said: "I've seen one huge run-off area at turn 16. Massive."

A look ahead to the weekend's weather for the European Grand Prix in Baku A look ahead to the weekend's weather for the European Grand Prix in Baku

Ferrari's Sebastian Vettel was similarly unperturbed by questions over safety, saying he was "thrilled" at the prospect of driving the track for the first time in practice.

"I don't understand why this has been the second type of question of the same nature. I walked the track and I was looking on the track, not so much on the runoffs," he said in the Drivers' Press Conference.

"I think it looks exciting. I'm thrilled to get in the car tomorrow and excited to get out and get a feel. Pit entry looks a challenge - but then again I think that's why we're here. And I certainly have the plan to stay on track and not use the run-off or the off-track."