هاد طريق جديد عالشغل.

A common learner-friendly transliteration is haad ṭarīʔ jdīd ʿash-shughl.

A few pronunciation notes:

• هاد = haad
• طريق = ṭarīʔ
  In many urban Levantine accents, the final ق is pronounced as a glottal stop, like the break in uh-oh.
• جديد = jdīd
  Depending on the region, the first sound may be like English j, or closer to zh.
• عالشغل = ʿash-shughl
  The first sound ʿ is the Arabic letter ع, which English does not really have.

هاد means this in Levantine Arabic.

It is the colloquial equivalent of MSA هذا.
Other Levantine varieties may use forms like هيدا, هادا, or هاظ.

In this sentence, هاد is masculine singular, which matches طريق as it is being treated here.

Because in Arabic, present-tense sentences like this usually do not use a word for is.

So:

• هاد طريق جديد literally looks like this road new
• but it means this is a new road/route

This is very normal in both colloquial Arabic and MSA.
If you wanted past or future, then a verb would usually appear.

Because هاد طريق جديد means This is a new road/route, where طريق جديد is an indefinite phrase: a new road.

Compare:

• هاد طريق جديد = This is a new road / route
• هالطريق جديد = This road is new

So the sentence you have is introducing something as a new route, not describing a specific already-known road as new.

Because in Arabic, adjectives normally come after the noun they describe.

So:

• طريق جديد = a new road / route
• literally: road new

This is the normal word order for noun + adjective in Arabic.

Because in this sentence, طريق is being treated as masculine, so the adjective also appears in the masculine form:

• masculine: جديد
• feminine: جديدة

A useful thing to know is that طريق can vary in gender depending on usage and dialect, but in this sentence the speaker is clearly using masculine agreement.

عالشغل means to work or to the workplace, depending on context.

It comes from:

• على = on / to / at
• الشغل = the work / work / the job

In Levantine, على (often shortened to عَ / عـ) is used very broadly, and with places or destinations it can often sound natural in English as to or at.

So here عالشغل is best understood as to work.

Because in everyday Levantine writing, speakers often write the shortened spoken form.

So:

• full form: على الشغل
• spoken/contracted form: عالشغل

Also, because الش begins with a sun letter (ش), the l sound of ال blends into the next sound in pronunciation. So it is pronounced more like ʿash-shughl than ʿal-shughl.

It can mean either, depending on context.

طريق can mean:

• road
• route
• way

In this sentence, the most natural interpretation is usually route to work or way to work, not necessarily a newly built physical road.

So a very natural sense is:

• This is a new route to work

It can cover all of those ideas.

In Levantine, شغل is a very common everyday word that can mean:

• work
• job
• one’s workplace
• sometimes even stuff/business, depending on context

In عالشغل, the intended meaning is usually to work in the sense of to the place where I work.

Yes. The overall structure is very Levantine, but some words may vary by region.

For example:

• هاد might also be هيدا, هادا, or هاظ
• ج in جديد may sound like j or zh
• ق in طريق is often a glottal stop, but some speakers keep it as q

So you may hear slightly different pronunciations, but the grammar and meaning stay basically the same.