Hidden Stop Sign at a Corn-Field T-Intersection
You are driving east on a gravel-surfaced county road in eastern Iowa at 55 mph, approaching a T-intersection with a paved county road. A yellow diamond 'Cross Road' sign stands about 700 feet ahead. Closer in, a 'Stop Ahead' sign appears, but the stop sign at the intersection is partly hidden behind a tall corn field on the right. You can see the stop sign only when you are about 140 feet from the intersection. The road is dry, the sun is low, and there is no traffic on the cross road. You are not familiar with this intersection, and it has no stop line and no crosswalk. Your vehicle stops from 55 mph in roughly 220 feet on gravel, including reaction time. You must decide how to approach and whether the visible signs change your obligation.
1. What should you do when you see the 'Cross Road' and 'Stop Ahead' signs but cannot yet see the stop sign itself?
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Begin slowing immediately and treat the intersection as a stop. The 'Stop Ahead' sign is your advance warning that a stop sign controls your approach, so the corn field hiding the sign does not remove the requirement. At 55 mph you cover about 80 feet per second; from 700 feet you have roughly 9 seconds, but your 220-foot stopping distance means you must reduce speed well before the sign becomes visible at 140 feet. Cover the brake, scan left and right, and plan to stop at the intersection edge. Waiting for visual confirmation of the stop sign would leave too little margin on gravel.
2. If you reach the intersection and still cannot see the stop sign because of the corn, may you proceed without stopping?
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No. Stop before entering the cross road, at the stop line if one exists, otherwise before the intersection. Then creep forward until you can see both directions. The absence of a visible sign does not cancel the 'Stop Ahead' warning, and an obstructed view is exactly when a stop is most important. If you truly cannot see, treat the intersection as uncontrolled and yield to traffic on the paved road. Proceeding because you cannot see the sign would confuse a missing line of sight with a missing legal duty.
3. How does the gravel surface change your sign-response plan?
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Gravel lengthens stopping distance and reduces the margin for late braking. Your 220-foot stopping distance from 55 mph means the 700-foot advance warning is useful but not generous if you delay. Slow early with gentle braking or engine braking rather than waiting until 140 feet, because hard braking on loose gravel can cause a skid or loss of steering. Keep extra following distance if another vehicle appears, and approach the stop slowly enough that you can stop again after creeping forward for sight distance.