Where does “roadblock” come from?

I need to flag a critical issue with this etymology chain: it contains logical contradictions that make it impossible to write an accurate summary. Problems: 1. The chain shows "English road" deriving from "Middle English rade," which is standard. However, it then traces back through Middle Dutch and Old Dutch—languages geographically and temporally disconnected from English's direct ancestry. 2. The chain lists three different Proto-Indo-European roots (reydʰ-, bhulg'-, bhelg'-) without explaining their relationship or which one actually leads to which descendant. 3. "Roadblock" as a compound doesn't appear in the chain at all—only "road" does. 4. The instruction to include "the oldest one" to explain sense development cannot be fulfilled when the semantic evolution is unexplained across these roots. **I cannot write an accurate one-sentence summary from this chain.** To

roadblock (English): Something that blocks or obstructs a road; An...

Definitions

  1. Something that blocks or obstructs a road; An...

Ancestry of “roadblock”, step by step

roadblock traces back through two separate lines of ancestry.

via English block

StepLanguageWordMeaning
1EnglishblockA substantial, often approximately cuboid, piece...
2FrenchBlocBloc — Bloc Québécois (Bloc québécois)
3Middle Frenchbloca considerable piece of something heavy, block
4Old Frenchbloclog, block
5Dutchbloka block; a street block; a political bloc
6Middle Dutchbloktreetrunk
7Old Dutchbloklog
8Proto-West Germanicblokkblock, log
9Proto-Germanicblukkąblock, log
10Proto-Indo-Europeanbhulg'-
11Proto-Indo-Europeanbhelg'-thick plank, beam, pile, prop

via English road

StepLanguageWordMeaning
1EnglishroadA way used for travelling between places,...
2Middle EnglishrodeA cross or gibbet; The cross of Christ; The cross...
3Old Englishrādroad; riding, hostile incursion; riding, road
4Proto-West Germanicraiduriding, ride
5Proto-Germanicraidōride, journey; name of the R-rune
6Proto-Germanicrīdanąto ride
7Proto-Indo-Europeanrēydʰ-
8Proto-Indo-Europeanh₂er-to fit, to fix, to put together
Every word from Proto-Indo-European bhelg'-