Operation phase emissions are presented in Section 11.11 of the Analysis of shortlisted options document and reported in kilotonnes of Carbon Dioxide equivalent (ktCO2e). Increased road-user emissions occur because the scheme is forecast to result in some additional car trips being made (induced traffic). The differences between options reflect differences in traffic volumes and length of the new A46 link:

• Option 3A is forecast to be the highest emitting option during the operational phase, generating an additional 13 ktCO2e in 2031, and 11 ktCO2e in 2041 compared with the Do-Minimum scenario, with around 660 ktCO2e emitted during a 60-year operational period. This is marginally higher than Option 3B (650 ktCO2e).
• The operational emissions for Options 2A and 2B are forecast to be slightly lower at around 630 ktCO2e over a 60-year operational period.
• The lowest emitting option is Option 1B which is forecast to generate an additional 9 ktCO2e in 2031, and 6 ktCO2e in 2041 compared with the Do-Minimum scenario, with around 390 ktCO2e during a 60-year operational period. The operational emissions for Option 1A are slightly higher at around 420 ktCO2e.