Britain's Queen Elizabeth will visit the Forth Road Bridge in Queensferry, Scotland today (04.07.14) - 50 years after she opened it.
The 88-year-old monarch, along with her husband Prince Philip, will unveil a plaque at the landmark which will pay tribute to the hard work of the workers who have maintained the bridge over the last five decades.
The plaque will be located near the Forth Estuary Transport Authority (FETA) offices.
FETA's Lesley Hinds told The Edinburgh Reporter newspaper: "It was a young HM The Queen who opened the Forth Road Bridge 50 years ago, so FETA is honoured to welcome Her Majesty back to help mark the Bridge's 50thbirthday.
"Many people have dedicated their entire lives to maintaining and operating the Forth Road Bridge - keeping a vital part of Scotland's infrastructure network in good shape - and I can think of no better way to commemorate the time and effort they have given over the years."
In addition to unveiling the plaque, Queen Elizabeth will meet six of FETA's longest-serving workers and be presented with flowers by young Charlotte Waite, aged eight.

Jessica Wright thinks 'The Only Way is Essex' bosses need to "listen up" and give her more screen time.
The 28-year-old reality star has hit out at the lack of airtime given to her and boyfriend Ricky Rayment and has urged producers to pay attention to their "massive fan base" who want to see more of them on the ITV2 show.
She said: "With 'TOWIE' there are a lot of characters and storylines so I think they struggle to fit everyone in. We have our time like we do in every series. But we do have a massive fan base which is really sweet. They do go crazy when we're not on it."
Jessica added to OK! Online: "Maybe 'TOWIE' need to start listening up."
The budding singer has even hinted she and Ricky would quit 'TOWIE' for their own spin-off show, but they would only make the leap if their fans were interested.
She said: "It would be hilarious if we did because our lives are pretty crazy."
Ricky added: "We'd absolutely love one but it's whether the fans want it. We'll have to do a survey and find out."

Lauren Pope and Lewis Bloor are dating.
'The Only Way Is Essex' stars - who were seen flirting on the latest episode of the ITV2 show on Wednesday (02.07.14) - have reportedly been enjoying a secret fling for weeks after initially locking lips in Marbella, Spain, last month.
A source told heat magazine: "Lewis has always fancied Lauren, but thought she wasn't interested. In Marbs, he made out he was keen on [new girls] Robyn Althasen and Imogen Leaver, but then he and Lauren started getting close - he made a real effort to get her attention. And it worked.
"They were out one night, started flirting and ended up having a kiss. They're really keen on each other."
While sparks are definitely flying between them, the ITV2 reality stars have been reluctant to go public with their romance for fear of ruining things.
An insider said: "Lauren is worried about being seven years older than him, but he's making every effort to be super -charming and show her it doesn't matter. He likes that she's more mature.
"They're keeping a low profile because they don't want to ruin things. As soon as things are on telly, they get complicated. Lauren was embarrassed when it all went wrong with Mario [Falcone] last year and doesn't want that to happen again."

Kevin Kennedy wants to return to 'Coronation Street'.
The 52-year-old actor is eager to reprise his role as loveable Curly Watts - the character he played for 20 years from 1983 to 2003 - after a visit to the soap's old set at Granada Studios in Manchester brought back lots of old memories.
Kevin is currently lending his support to the 'Corrie' set tour which allows fans to walk down the iconic cobbles used in the show until its move to a new state-of-the-art set in Salford, Greater Manchester.
Speaking to the Manchester Evening News newspaper, Kevin - who now lives in Brighton - said: "The whole experience makes you a bit homesick really. Not just for Weatherfield but for Manchester.
"And it's very gratifying to know the fans still remember me and what we did here, it's joyful. It's no secret I'd love to do some more but as far as I know, there are no plans at the moment.
"I have a great relationship with 'Coronation Street' and always have and if the opportunity arises then I'll be very happy if it doesn't then that's life."
Soap fans adored Curly's romance with Raquel Watts (Sarah Lancashire) and the couple were one of Corrie's best-loved pairings.
Curly left Weatherfield in 2003 to start a new life in Newcastle with his second wife, Emma.

Rolf Harris has been jailed for five years and nine months after being found guilty of 12 counts of indecent assault.
The 84-year-old TV presenter was convicted of attacking four underage girls, including the friend of his daughter Bindi Nicholls, between 1968 and 1986 on Monday (30.06.14), and his sentencing took place at London's Southwark Crown Court this afternoon (04.07.14).
Mr Justice Sweeney told Rolf: "You have shown no remorse for your crimes at all. Your reputation lies in ruins, you have been stripped of your honours, but you have no one to blame but yourself."
In a long-running and emotional seven-week trial, a jury heard how Harris had a "dark side" behind what the prosecution described as his "friendly and lovable exterior".
The 'Animal Hospital' star strenuously denied sexually assaulting a friend of his daughter's as a teenager, but conceded he did have a relationship with the woman - now 40 - in her adult years.
The unidentified female accused Harris of abusing her from the age of 13 and claims the TV star performed a sex act on her at his home in Bray, Berkshire, and didn't seem troubled by the fact Bindi was asleep nearby.
Harris was first questioned by police in November 2012 and his name was made public in April 2013.
He was re-arrested and questioned over further alleged sexual offences last August, before the case went to trial in April.

America Ferrera cries every time she watches 'The Lion King'.
The 'Ugly Betty' star has confessed she is a big fan of classic children's movies and admits she was so moved by the story of Simba the lion cub searching for his identity after his father Mufasa is killed that she's brought to tears every time she watches it.
She said: "I grew up loving 'The Lion King'. I'll never forget when Mufasa dies in the film. I remember watching it ten times and crying every time and thinking, 'No! How could they do that?' It felt very real."
The 30-year-old actress - who is currently starring in animated film 'How to Train Your Dragon 2' alongside Gerard Butler and Cate Blanchett - also revealed that she found herself connecting more to male characters when she was younger as she didn't relate to traditional female roles.
She explained: "What's interesting is that, as a girl, a lot of the characters I related to were the male characters because they were doing what I wanted to be doing.
"They were having the adventures. I didn't watch Lion King and think and, 'Yes, I want to be Nala' [Simba's female friend]. I thought, I'm Simba!"
Ferrera also spoke about her love of acting and claimed she knew she wanted to become an actress when she was just eight-years-old.
The brunette beauty added: "My mother let me do it and I think she always imagined it was just a hobby or a phase and that eventually I would become a lawyer."
'How to Drain Your Dragon 2' is set for UK release on July 10 2014.

'Fantastic Beasts and Where to Find Them' will be filmed at the same location as 'Harry Potter'. Warner Bros. will shoot the film adaptation of the novel by author J.K. Rowling at its Warner Studios in Leavesden, southeast England, where all seven of ...

Explicit photographs of Demi Lovato have leaked online after her boyfriend's Twitter page was hacked.
Wilmer Valderrama, 34, has proclaimed his innocence after the images - including one of her topless, another of her naked on a bed, and one of them kissing - appeared on his social networking site yesterday (03.07.14).
The hunky star later posted on his Twitter and official Facebook page: "ATTENTION EVERYONE!!! My twitter account got hacked... Please spread the word (sic)."
However, it seems the announcement wasn't enough for Wilmer, who has been dating Demi on/off since 2010, as he then deleted his Twitter account to save his 21-year-old beau from any more embarrassment.
It is believed the images are the same nude snaps that were leaked on the internet in April, but it is not yet known who hacked Wilmer's account this time around.
Meanwhile, the couple - who rekindled their romance in February 2013 - sparked rumours they were getting engaged in December after Wilmer was spotted buying a ring from Tiffany & Co., which he had engraved with a special message reading, "With you and by you always."
The former 'That 70s Show' star also appears in Demi's new music video 'Really Don't Care', which shows the loved-up duo cosying up to each other.

Sir Bob Geldof has spoken out about his "intolerable" pain following his daughter's death three months ago.
The 62-year-old singer-songwriter is still coming to terms with the death of Peaches, who passed away in April aged 25, and admits he "buckles" at the thought of her.
Speaking in his first interview since her death, he said on ITV's 'Lorraine' this morning (04.07.14): "Well, there's not many options... it's intolerable... it's very hard as everybody must realise, especially if it happened to them too, and then what else do you do, you get on with it.
"I go into organisation mode and that distracts me. But, like anybody else, these things assault you without warning. You could be talking to someone, you could be walking down the road, and suddenly out of the blue there's an awareness of her. And you know - I buckle."
Sir Bob also believes it's a good thing Peaches' sons Phaedra, two, and Astala, 14 months are so young because they won't remember their mother's death.
He explained: "My Mum died when I was six or seven. I have no memory of her. I am shown photos I really have no interest in that much because I have no memory of her. They are so small, the little chaps, that I'm not sure they'll have this craving to remember their Mum, and I think that is healthy."
Peaches was found dead by her husband Thomas Cohen at their home in Wrotham, Kent, and an inquest heard in May that heroin was "likely" to have played a role in the blonde beauty's death.

McBusted showered with One Direction on tour.
The super-group - comprised of McFly's Harry Judd, Tom Fletcher, Danny Jones and Dougie Poynter, as well as Busted's Matt Willis and James Bourne - got up close and personal with the 'Best Song Ever' hitmakers after they were forced to share a dressing room when they supported them on their 'Where We Are' world tour.
Speaking on 'Good Morning Britain' this morning (04.07.14), Matt said: "I think Niall [Horan] was a bit fascinated about how we're all in the same dressing room. How we'd fit!"
James added: "We don't have individual rooms or individual riders. We arrive together, we leave together, we change together, we shower together."
Meanwhile, the 'Where We Are' tour, which kicked off in April, will continue to visit arenas and stadiums across the globe until October.
However, the 'Midnight Memories' singers have already had to ask their fans to calm down after Niall Horan was pelted in the knee with a heavy object during a gig in Amsterdam, Holland, last month.
Niall - who had major knee surgery in January - posted on Twitter at the time: "Amsterdam thank you for a great couple of shows! Appreciate you coming.
"Also guys! Can you limit what gets thrown on stage please! Coz somethin thrown at me tonight! Hit my knee! A lot of pain from it!
"Never wana sound like I'm complaining! But only having my operation 5 months ago, I still get a bit of pain and I'm very scared about it. (sic)."

Frankie Sandford was nearly called "Wimpy".
The Saturdays singer's mother Vivian joked that she almost named Frankie, 25, after the fast food chain because she was craving the calorific food when she was pregnant with her.
Talking to Rickie, Melvin and Charlie on the KISS FM UK radio station's 'Breakfast Show' this morning (04.07.14), Vivian explained: "When I had Frankie, I craved Wimpy's. I've actually got a better taste now, but yes, then it was Wimpy's, I'm afraid. With my eldest daughter, it was plums and that's why she's called Victoria."
Rickie joked: "Frankie, you could've been called Wimpy."
Vivian replied: "Well, we decided not to ... you know."
Frankie quipped: "Can I just say, I am a bit of a wimp."
Meanwhile, the brunette beauty gave birth to her own son Parker, whom she has with her fiancé Wayne Bridge, 33, eight months ago and she admits losing the baby weight was a lot harder than people assume.
When asked how she's got back into shape so quickly, she explained: "Healthy eating and loads of exercise, lots of hard work. That's what annoys me, everyone is like she snapped back into shape, and I'm like I wish I snapped back."

Jennifer Hudson performed at the WDAS radio event in Philadelphia wearing a pair of high waisted blue jeans with a black crop top printed the words "Love" and "Hate".