Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Tire code
Table title:
Speed rating
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Code </th><td colspan=1 rowspan=1 > km/h </td><td colspan=1 rowspan=1 > mph </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > Code </th><td colspan=1 rowspan=1 > km/h </td><td colspan=1 rowspan=1 > mph </td></tr>
<tr> <th colspan=1 rowspan=1 > A1 </th><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > L </th><td colspan=1 rowspan=1 > 120 </td><td colspan=1 rowspan=1 > 75 </td></tr>
<tr> <th colspan=1 rowspan=1 > A2 </th><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > M </th><td colspan=1 rowspan=1 > 130 </td><td colspan=1 rowspan=1 > 81 </td></tr>
<tr> <th colspan=1 rowspan=1 > A3 </th><td colspan=1 rowspan=1 > 15 </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > N </th><td colspan=1 rowspan=1 > 140 </td><td colspan=1 rowspan=1 > 87 </td></tr>
<tr> <th colspan=1 rowspan=1 > A4 </th><td colspan=1 rowspan=1 > 20 </td><td colspan=1 rowspan=1 > 12 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > P </th><td colspan=1 rowspan=1 > 150 </td><td colspan=1 rowspan=1 > 94 </td></tr>
<tr> <th colspan=1 rowspan=1 > A5 </th><td colspan=1 rowspan=1 > 25 </td><td colspan=1 rowspan=1 > 16 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > Q </th><td colspan=1 rowspan=1 > 160 </td><td colspan=1 rowspan=1 > 100 </td></tr>
<tr> <th colspan=1 rowspan=1 > A6 </th><td colspan=1 rowspan=1 > 30 </td><td colspan=1 rowspan=1 > 19 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > R </th><td colspan=1 rowspan=1 > 170 </td><td colspan=1 rowspan=1 > 106 </td></tr>
<tr> <th colspan=1 rowspan=1 > A7 </th><td colspan=1 rowspan=1 > 35 </td><td colspan=1 rowspan=1 > 22 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > S </th><td colspan=1 rowspan=1 > 180 </td><td colspan=1 rowspan=1 > 112 </td></tr>
<tr> <th colspan=1 rowspan=1 > A8 </th><td colspan=1 rowspan=1 > 40 </td><td colspan=1 rowspan=1 > 25 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > T </th><td colspan=1 rowspan=1 > 190 </td><td colspan=1 rowspan=1 > 118 </td></tr>
<tr> <th colspan=1 rowspan=1 > B </th><td colspan=1 rowspan=1 > 50 </td><td colspan=1 rowspan=1 > 31 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > U </th><td colspan=1 rowspan=1 > 200 </td><td colspan=1 rowspan=1 > 124 </td></tr>
<tr> <th colspan=1 rowspan=1 > C </th><td colspan=1 rowspan=1 > 60 </td><td colspan=1 rowspan=1 > 37 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > H </th><td colspan=1 rowspan=1 > 210 </td><td colspan=1 rowspan=1 > 130 </td></tr>
<tr> <th colspan=1 rowspan=1 > D </th><td colspan=1 rowspan=1 > 65 </td><td colspan=1 rowspan=1 > 40 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > V </th><td colspan=1 rowspan=1 > 240 </td><td colspan=1 rowspan=1 > 149 </td></tr>
<tr> <th colspan=1 rowspan=1 > E </th><td colspan=1 rowspan=1 > 70 </td><td colspan=1 rowspan=1 > 43 </td><td colspan=1 rowspan=1 >  </td><th class="highlighted"  colspan=1 rowspan=1 > Z </th><td class="highlighted"  colspan=1 rowspan=1 > over 240 </td><td class="highlighted"  colspan=1 rowspan=1 > over 149 </td></tr>
<tr> <th colspan=1 rowspan=1 > F </th><td colspan=1 rowspan=1 > 80 </td><td colspan=1 rowspan=1 > 50 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > W </th><td colspan=1 rowspan=1 > 270 </td><td colspan=1 rowspan=1 > 168 </td></tr>
<tr> <th colspan=1 rowspan=1 > G </th><td colspan=1 rowspan=1 > 90 </td><td colspan=1 rowspan=1 > 56 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > (W) </th><td colspan=1 rowspan=1 > over 270 </td><td colspan=1 rowspan=1 > over 168 </td></tr>
<tr> <th colspan=1 rowspan=1 > J </th><td colspan=1 rowspan=1 > 100 </td><td colspan=1 rowspan=1 > 62 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > Y </th><td colspan=1 rowspan=1 > 300 </td><td colspan=1 rowspan=1 > 186 </td></tr>
<tr> <th colspan=1 rowspan=1 > K </th><td colspan=1 rowspan=1 > 110 </td><td colspan=1 rowspan=1 > 68 </td><td colspan=1 rowspan=1 >  </td><th colspan=1 rowspan=1 > (Y) </th><td colspan=1 rowspan=1 > over 300 </td><td colspan=1 rowspan=1 > over 186 </td></tr>
</table>
Question:
What does code Z in tire code indicate?
Answer:
The Z indicated the excess speed of 240 km/h (149 mph).