How many lanes does a bidirectional four-lane road have?
3 Answers
A bidirectional four-lane road has a total of four lanes. Additional information: 1. Article 67 of the Road Traffic Safety Law stipulates: Pedestrians, non-motor vehicles, tractors, wheeled special machinery vehicles, articulated buses, full trailers, and other motor vehicles with a maximum design speed of less than 70 kilometers per hour are not allowed to enter expressways. The maximum speed limit indicated by expressway speed limit signs shall not exceed 120 kilometers per hour. 2. Article 78 of the Road Traffic Safety Law stipulates: Expressways shall indicate the driving speed of lanes, with the maximum speed not exceeding 120 kilometers per hour and the minimum speed not less than 60 kilometers per hour.
A dual four-lane road refers to a roadway divided into two directions, with each direction having two lanes, totaling four lanes across the entire road. I frequently encounter this configuration in my daily driving, and it makes for a much more comfortable experience on highways or provincial roads. The extra lane allows for safer overtaking by moving into the left lane instead of dangerously squeezing through on the right. This design is also common on urban arterial roads, effectively alleviating traffic congestion by distributing vehicles across lanes, reducing sudden braking incidents. I find this layout particularly practical—cost-effective without occupying too much space, and maintenance is straightforward, such as segmenting road cleaning or pothole repairs. Safety-wise, during rainy or foggy conditions, clear lane markings improve visibility and lower accident risks, making it driver-friendly for both novices and veterans.
From my driving experience, a dual four-lane road means two lanes in each direction, forming four lanes in total. This design makes driving smoother, which I deeply experienced on provincial highways during long trips. The left lane is for overtaking or fast driving, while the right lane allows slower vehicles to maintain a steady pace, preventing congestion and skidding. Driving in heavy rain particularly benefits from this setup, as the extra lane provides a safety buffer, helping to avoid rear-end collisions caused by blind spots in the rearview mirror. In terms of road planning, this configuration balances cost and efficiency, not occupying as much space as six-lane roads, making it suitable for medium-traffic areas. I've personally observed that in mountainous curves, dual four-lane roads significantly reduce traffic accidents by separating traffic flow and easing the pressure of sharp turns. Maintenance is also easier compared to narrow roads, with snow removal being quicker and more efficient.
