Water Over the Road and a Barricade at Night
It is 11:20 p.m. during a heavy rain event in Calcasieu Parish. You are driving a compact car with two children in the back seat, following a GPS route toward a shelter. Ahead, a two-lane road dips under a railroad overpass. You see a yellow diamond sign with a wavy arrow and 'FLOOD AREA' plaque, then a Type III barricade with an orange-and-white 'ROAD CLOSED' sign. Water is lapping at the barricade and extends 25 feet into the dip; you cannot see the pavement under it, and the rain is falling harder. A sedan ahead has stopped, then backs up. Your fuel gauge shows one-quarter tank, and your phone has weak service. The detour sign points left onto a parish road that is unlit.
1. What do the warning sign, barricade, and ROAD CLOSED sign each mean, and what is the legal and safe action?
Read the worked answer
Warning sign: the yellow diamond with the wavy arrow and FLOOD AREA plaque warns that water commonly covers this dip; it is not a command to stop, but it raises the risk. Barricade and ROAD CLOSED sign: these are regulatory traffic-control devices closing the road. You must not drive past them, and you must not go around them on the shoulder. The water is 25 feet into the dip and you cannot see the pavement, so depth and current are unknown. The legal and safe action is to turn around at the first safe point and take the signed detour.
2. The sedan backs up and then drives around the barricade on the right shoulder. Should you follow? Explain using the risk factors.
Read the worked answer
No. The sedan's driver is taking a risk you should not copy. Barricades close the whole roadway, not just the paved lane; the right shoulder may be eroded or drop off under water. At night, with no visible pavement, you cannot judge depth, and 25 feet of water can hide a washed-out culvert. A stalled vehicle in water can float or trap occupants. The fact that another driver went around does not make it legal or safe. Turn around and use the detour.
3. How should you choose the detour and manage the low-fuel and weak-service constraints?
Read the worked answer
Follow the detour sign first, but verify the parish road is passable before committing: it is unlit, so slow to a speed you can stop within the distance you can see, use low beams, and watch for water across the detour too. With one-quarter tank, do not take a long unplanned loop; note the fuel range and head for the nearest open fuel station or higher ground on the route. Weak service means do not rely on GPS alone-use the signed evacuation route and call 511 or local emergency only when stopped safely. If the detour is also flooded or blocked, return to higher ground and call for guidance.