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This graph shows four distinct lines. The first line is colored pink and is labeled A 402 Aptek. The second line, black is labeled B 403 Aptek. The third line, blue is labeled C 402 UNL. Finally, the fourth line, red is labeled D 403 UNL. The vertical axis of this graph ranges from zero to 2 and represents Internal Energy (E plus 3) while the horizontal axis of this graph ranges from zero to 40 and represents Time. All four lines begin at the point of zero on both axes. Lines A and C follow suit and rise from their starting points to 0.48 on the vertical axis and 3 on the horizontal axis where they both run in a nearly straight line across the remainder of the graph, leaving it at the point of 0.49 on the vertical and 40 on the horizontal axis. Lines B and D follow suit, spiking upward from their starting point to 1.25 on the vertical axis and 4 on the horizontal axis, where the two lines split and line D continues to ascend higher on the graph than line B. Line B ascends and leaves the graph at the point of 1.5 on the vertical axis and 40 on the horizontal axis while line D ascends and leaves the graph at the point of 1.55 on the vertical and 40 on the horizontal axis.
FHWA-HRT-05-096
