In regard to the signing projects mentioned in the OP, they have not yet been advertised and plans are not available for any of them. I will continue to monitor the situation. Judging by the dollar ranges quoted, it looks like they intend to do some heavy-duty sign panel replacement in all but one or two districts. The amounts are much greater for Districts 61 & 62, which I assume are splinters of a former District 6 covering the New Orleans area and would therefore have a considerable amount of urban mileage with closely spaced exits.
In my experience it is fairly unusual for LaDOTD to do freeway sign replacements as district-wide jobs (the 737 project codes signify district-wide jobs). In my collection of pattern-accurate LaDOTD signing sheets, I have just one 737 project, which was done about four years ago to provide I-10 alternate route signing on US 190 etc. The more usual approach for LaDOTD is to carry out sign upgrades at the corridor level, with Interstate guide sign replacements having 45X project codes (450 = I-10, 454 = I-12, 455 = I-49, etc.).
There might be pattern-accurate sign layout sheets but I am not optimistic. Sign design sheets--forget it.