Initial Maneuver Distance Formula |
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| \( d_1 \;=\; \dfrac{ t_1 }{ 0.68 } \cdot \left( \bar {u} - m + \dfrac{ \bar {a} \cdot t_1 }{ 2 } \right) \) | ||
| Symbol | English | Metric |
| \( d_1 \) = initial maneuver distance | \(ft\) | \(m\) |
| \( t_1 \) = time of initial maneuver | \(sec\) | \(s\) |
| \( \bar {u} \) = average speed of passing vehicle | \(ft\;/\;sec\) | \(m\;/\;s\) |
| \( m \) = difference in speed of passing vehicle and passing vehicle | \(ft\;/\;sec\) | \(m\;/\;s\) |
| \( \bar {a} \) = average acceleration | \(ft\;/\;sec^2\) | \(m\;/\;s^2\) |
Initial maneuver distance, abbreviated as \(d_1\), is the distance traversed during the perception and reaction time and during the initial acceleration to the point of encroachment on the left lane.
Initial Maneuver Distance Formulas |
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| \( d_1 \;=\; 1.47 \cdot t_1 \cdot \left( \bar {u} - m + \dfrac{ \bar {a} \cdot t_1 }{ 2 } \right) \) | ||
| Symbol | English | Metric |
| \( d_1 \) = initial maneuver distance | \(ft\) | \(m\) |
| \( t_1 \) = time of initial maneuver | \(sec\) | \(s\) |
| \( \bar {u} \) = average speed of passing vehicle | \(ft\;/\;sec\) | \(m\;/\;s\) |
| \( m \) = difference in speed of passing vehicle and passing vehicle | \(ft\;/\;sec\) | \(m\;/\;s\) |
| \( \bar {a} \) = average acceleration | \(ft\;/\;sec^2\) | \(m\;/\;s^2\) |