Highways England Yorkshire Water, South Yorkshire Police and Barnsley Council are working together to tackle dangerous parking along the A616, which runs close to Langsett Reservoir.
Kim Taylor, programme development team leader at Highways England, said: “We’re unfortunately seeing more irresponsible parking along the verges and for the wrong reason in laybys which puts every other road user in serious danger, as well as themselves.
“One of our gritters was unable to get through in one instance after two vehicles were parked inconsiderately on both sides of the road. We understand that people will want to visit this beautiful area of Yorkshire as restrictions ease, but we want everyone to be safe and consider the safety of others.”
Temporary signage has been installed on the road warning visitors not to park dangerously.
Gaynor Craigie, head of land and property at Yorkshire Water, said: “It is important people are considerate of local communities and understand the dangers of parking illegally at any of our sites, but particularly at Langsett where cars parked on the side of the road can pose a significant danger to other road users.
"We will have colleagues on site in the coming weeks to help visitors with parking and ensure they can enjoy our reservoir safely.”
The organisations are asking people who are meeting friends and family outdoors this Easter to minimise travel where possible.
But for those who do need to travel, they are asking people to plan ahead, travel at quiet times, regularly sanitise hands, wear a face covering unless exempt and, where possible, keep their distance from others.
They urged any visitors who do go to the Yorkshire beauty spot to either use the designated car parks at Langsett Reservoir or Langsett Barn, or turn back if they are full.
Barnsley Neighbourhood Inspector Rebecca Richardson said: “When visiting Barnsley’s beauty spots we urge you to think about considerate parking. Parking in non-designated areas and on grass verges creates dangers for motorists and pedestrians; vehicles can restrict people’s views of a road they are crossing and cause drivers to have to move quickly to avoid collisions.”
Sarah Norman, chief executive of Barnsley Council, added: “We want everyone to be able to use outdoor spaces safely, particularly now restrictions are easing, and people are enjoying more time visiting local beauty spots.
“I would urge anyone who plans to visit the reservoir or any other popular greenspaces over the coming weeks to consider where they park to protect themselves and other road users. We have plenty of beautiful green spaces across our borough, so if an area does look busy, there are always alternative places to visit.
“Residents are asked that when they head outdoors to be mindful of the communities they are visiting, try to stay local where possible when planning activities and remember to follow the hands, face, space guidance to protect themselves and their families while they’re outdoors.”
Highways England is asking drivers to plan their journeys before setting off, follow Government advice, and click here to find out more information about where to park for free.