A flexible pavement has been designed for two lane single carriageway of width $7$ m with the following data:

$($i$)$ Commercial vehicle per day in each direction $=750($as on $31\mathrm{.}03\mathrm{.}2018)$

$($ii$)$ Date of completion of construction $=31\mathrm{.}03\mathrm{.}2020$

$($iii$)$ Rate of traffic growth $=10\%$ per annum

$($iv$)$ Design life $=10$ years

$($v$)$ Vehicle damage factor $=2-0$

$($vi$)$ Lane distribution factor $($LDF$)$ for $2-$lane single carriageway road $=0-75$

$($vii$)$ LDF of $4-$lane dual carriageway road $0-75$ in each direction

Due to some issues, starting of construction got delayed and work started on $01\mathrm{.}04\mathrm{.}2023.$ In the meantime government has decided to develop the road as four lane dual carriageway. Considering the same design data as planned earlier, calculate the new design life of the project. Assume any additional data required for the design suitably.