A certain horizontal curve on a 6-lane highway (3 lanes each direction with no median) has a superelevation of 4% and a central angle of 39.6 degrees. The road has 12ft lanes and 8.2ft shoulders on both sides with high retaining walls going up immediately next to the shoulders. If the radius of the curve is 1494.9ft, determine the SSD (ft) provided on the curve.   Round your answer to 3 decimal places.

Q: answer question 18 only

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