• Air Toxics
• CMAQ
• Conformity

• Laws and Regulations
• Policy and Guidance
• Research
• Reference Material
• Models & Methodologies
• Training

FHWA → Environment → Air Quality → Conformity → Practices → Ohio River

Final PM_2.5 Project-Level Conformity Analysis for the Ohio River Bridges Project in Louisville, Kentucky

Appendix A: AADT and Truck Percentages for Current (2006), 2014, and 2020

	Roadway	Annual Average Daily Traffic (AADT)	Percent Trucks 14,15	Total Annual Average Daily Traffic Impact (AADT)	Average Weighted Truck Percent	Total Average Daily Trucks
Downtown Current (2006)	I-65	139,500	9.4%	293,200 16	11.1%	32,500
Downtown Current (2006)	I-64	134,500	13.6%	293,200 16	11.1%	32,500
Downtown Current (2006)	US 31	19,200	5.8%	293,200 16	11.1%	32,500
East End Current (2006)	No East End River crossing	0	0	0	0	0
Downtown No-Action (2020)	I-65	158,600	13.3%	333,400 17	15.7%	52,300
Downtown No-Action (2020)	I-64	152,900	19.2%	333,400 17	15.7%	52,300
Downtown No-Action (2020)	US 31	21,800	8.2%	333,400 17	15.7%	52,300
East End No-Action (2020)	No East End River crossing	0	0	0	0	0
Downtown Build (2020) Worst-Case	I-65	138,600	13.3%	291,400 18	15.7%	45,700
Downtown Build (2020) Worst-Case	I-64	133,700	19.2%	291,400 18	15.7%	45,700
Downtown Build (2020) Worst-Case	US 31	19,100	8.2%	291,400 18	15.7%	45,700
East End Build (2020)	With East End Bridge	61,400	13.6%	61,400 19,20	13.6%	8,300
East End Build (2014) Worst-Case	With East End Bridge	53,200	11.7%	53,200	11.7%	6,200
Covington I-75/71/I-275 Current (2006)	I-75/71	164,900	30.0%	259,900	22.7%	59,000
Covington I-75/71/I-275 Current (2006)	I-275	95,000	10.0%	259,900	22.7%	59,000

---

¹⁴ The truck percentage includes diesel and gasoline trucks as well as buses.
¹⁵ 2006 truck percentages are based on 2006 KYTC traffic counts; future truck percentages have been calculated using KYTC agreed-upon statewide averages by highway type (HPMS functional class)
¹⁶ 31,900 of this downtown river crossing AADT would cross at the east end if a bridge were available.
¹⁷ 42,000 of this downtown river crossing AADT would cross at the east end if a bridge were available.
¹⁸ 42,000 additional AADT would be crossing downtown if the east end bridge were not available.
¹⁹ Although the 2020 AADT for the east end bridge is greater than the 2014 AADT, the 2014 AADT is considered the worst-case due to regulation and technology induced emission reductions between 2014 and 2020.
²⁰ It should be noted that of this 61,400 AADT 19,400 is induced travel