Latest news with #drivinghazards
CBS News
08-07-2025
- Science
- CBS News
Impending mayfly hatch causes southeastern Minnesota bridge to go dark
The lights will go out on a bridge over the Mississippi River in Winona, Minnesota, for the next few weeks to squelch the impact of a mayfly hatch. The Minnesota Department of Transportation said the overhead lights on the Highway 43 bridges will be off until mayflies fully hatch, "to reduce the number of mayflies on the bridge." Having mayflies on the bridge can "cause dangerous driving conditions because it becomes slippery," MnDOT said. MnDOT While the insects are harmless, their sometimes overwhelming numbers can make them a nuisance. Still, the Minnesota Department of Natural Resources said they are extremely important in the aquatic food web, and are fed upon by other invertebrates, amphibians, reptiles, fish, birds, and mammals. Mayflies spend 99% of their lives as larvae living in the sediment of freshwater systems like the Mississippi River, the DNR said. The hatching phenomenon in the Mississippi River occurs as the burrowing mayflies emerge all at once to mate, lay eggs and then die. In 2021, a massive hatch in downtown St. Paul blanketed the city's roads and sidewalks. A year later, a hatch near La Crosse, Wisconsin, was so large it showed up on radar.
RNZ News
16-06-2025
- Climate
- RNZ News
Black ice and freezing temperatures a concern for Mackenzie Basin
Photo: RNZ / Maja Burry The Transport Agency is warning motorists to take care with black ice and freezing temperatures expected to cause issues in the Mackenzie Basin this week. Waka Kotahi says fog, hoar frosts and black ice are likely to make driving challenging on State Highways 8 and 80 in inland Canterbury over coming days. Parts of State Highway 8 near Lake Tekapo have been reduced to 50 kilometres per hour and roads will be closed if conditions get worse. Waka Kotahi system manager Mark Pinner said while reducing speed is not a usual approach, typical de-icing agents were working at an extreme range, making them less effective. "The nature of the conditions forecast for this week means we need to use every tool we can to keep people safe on the roads," he said. Pinner said motorists should slow down, especially with the roads expected to be busy over the Matariki long weekend. "We also know it's going to get busier later in the week as we get closer to the long holiday weekend for Matariki. Reducing speed is the biggest thing drivers can do to keep themselves safe and to help keep the highways open." Meanwhile, State Highway 7 between Canterbury and the West Coast will remain closed for a second night after a slip discovered on Sunday morning led to the closure between Springs Junction and Island Hills. Waka Kotahi says contractors have worked with a geotechnical expert to prevent further debris falling at the slip, which is just south of Riordan Creek Bridge. The closure includes Lewis Pass and Maruia Springs. There is no detour, and motorists have been asked to delay travel and avoid the area. A single lane is expected to open at 7am Tuesday, with traffic management in place.
