Eva Mendes is stopped by a bicycle police officer for 'using her phone while driving

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Trouble: Eva Mendes is stopped by a bicycle police officer for allegedly using her phone while driving

If caught, drivers face fines of $20 and $50 for first and subsequent offenses, while drivers may use a hands-free phone.

The star is currently dating her Beyond the Pines co-star Ryan Gosling, but recent reports suggest their relationship may be on the rocks.

Eva hasn't made a public appearance with long-term beau Ryan Gosling, 33, in months.

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Signature style: The actress was instantly recognisable with her hair in a bun

The couple got together in September 2011 after meeting on the set of The Place Beyond The Pines, but their relationship was reported to be going through a rough patch in December 2013.

An insider told InTouch: 'Eva loves Hollywood, the parties, the glamour. She loves going out.'

But Ryan was described as 'introverted - very serious and a total homebody'.

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Stopped: Eva puled up her car while a police officer asked for some details

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On the road: Eva's grey car was stopped by a cop travelling on a black bike

Another source told Radar online: ’The real question is how Eva is going to figure into Ryan’s plans. They both know they need some kind of resolution in their relationship before they go out and promote their movie, in which Ryan directed Eva in a very big part.’

The pair worked together in in Ryan’s directorial debut, How to Catch a Monster, which he also wrote and produced.

The dark fantasy film includes scenes shot at Detroit’s Masonic Temple and follows a single mother whose son uncovers a road leading to an underwater utopia.

The film, which is set to be released this year, also stars Christina Hendricks, Matt Smith and Saoirse Ronan. 

Mail Online has contacted a representative for Eva Mendes for comment. 

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On the rocks? Eva's relationship with Ryan Gosling is reportedly under strain

Eva Mendes was stopped by a police officer for allegedly using her mobile phone while driving.

The brunette star was spotted at the wheel of her car in LA on Thursday as a bicycle cop pulled up and proceeded to take down her details.

Eva, 39, who wore her hair in her signature bun and sported a pair of blue sunglasses, reportedly used a handheld mobile at the wheel, which is illegal in California.