The bridge I'm currently working on is 24' wide for 2 lanes...built in the 70s I believe. I'm not arguing with you, just trying to help clarify.As I stated in my post, THE NEW STANDARD is 16'-9" Any bridge thats 80 years old (as this one likely is) would have been a lower height standard. Why? Look how loads have changed over the years. Old bridges used to all be 24' wide (some were 20') but you wont find one built in the last 30 years less than 32' and most are 40' wide. (2-12' lanes, 2-8' shoulders min.)
No TR4 on this bridge so probably 70s or earlier and not designed for that impact. And for everyone criticizing OK's bridges, there has been amazing improvement by ODOT regarding structurally insufficient bridges in the past years given assigned funding.