Transportation Alternatives

Let the terrain choose the mode, corridor by corridor

Planning phase. An independent plan; nothing is funded or built yet. What this means

Five modes were screened on the same basemap and stations. The result is a hybrid: electric buses wherever they are practical now, a gondola only where the mountain makes roads slow and steep, and rail kept open for the flat valley corridor if demand ever justifies it.

Screening summary

Capital figures are AACE Class 5 order-of-magnitude bands (−20/−50% to +30/+100%) in source-year dollars — not budgets.

Alternative
A · Electric bus rapid transit
Serves Mountaintop / Iacocca Hall?
Yes, by bus on 11–13% grades
Capital (Class 5)
~$45–215M BRT-lite; ~$320–880M with full dedicated lanes; plus fleet
View
Phase 1 · conditional target 2029
Alternative
B · Valley light rail + connector
Serves Mountaintop / Iacocca Hall?
No — needs a bus or gondola connector
Capital (Class 5)
~$0.5–2.0B (plus bridge and connector)
View
Long-term idea
Alternative
C · Mixed surface / tunnel
Serves Mountaintop / Iacocca Hall?
No — a station would be ≈196 m deep
Capital (Class 5)
~$0.8–3.4B; tunnel risk wider
View
Long-term comparison
Alternative
D · Underground automated metro
Serves Mountaintop / Iacocca Hall?
No
Capital (Class 5)
~$1.6–6.4B; tunnel risk wider
View
Reference only
Alternative
X · Aerial gondola link
Serves Mountaintop / Iacocca Hall?
Yes — directly
Capital (Class 5)
~$0.05–0.35B (low confidence)
View
Phase 1 option · conditional target 2029Only with a sponsor, land and a written regulatory path by about 2027; otherwise after 2030, if at all.
Alternative
Hybrid (A + X + valley option)
Serves Mountaintop / Iacocca Hall?
Yes
Capital (Class 5)
Staged — see Bethlehem 2030
View
Recommended for study

Alternative	Serves Mountaintop / Iacocca Hall?	Capital (Class 5)	View
A · Electric bus rapid transit	Yes, by bus on 11–13% grades	~$45–215M BRT-lite; ~$320–880M with full dedicated lanes; plus fleet	Phase 1 · conditional target 2029
B · Valley light rail + connector	No — needs a bus or gondola connector	~$0.5–2.0B (plus bridge and connector)	Long-term idea
C · Mixed surface / tunnel	No — a station would be ≈196 m deep	~$0.8–3.4B; tunnel risk wider	Long-term comparison
D · Underground automated metro	No	~$1.6–6.4B; tunnel risk wider	Reference only
X · Aerial gondola link	Yes — directly	~$0.05–0.35B (low confidence)	Phase 1 option · conditional target 2029Only with a sponsor, land and a written regulatory path by about 2027; otherwise after 2030, if at all.
Hybrid (A + X + valley option)	Yes	Staged — see Bethlehem 2030	Recommended for study

Six small maps on one basemap: A (bus rapid transit), X (gondola) and the hybrid drawn as lines; B (valley light rail), C (mixed tunnel) and D (underground metro) shown only as station areas with text notes, no rail alignment — Alternatives on one basemap (v0.2 screening, Hellertown-start trunk). B, C and D are rail ideas shown as text only: no rail route, tunnel or alignment is drawn. Dots and shaded areas mark station areas, not sites.Unit costs: Eno Center (2020) $73M/km at-grade and $354M/km underground rail; ITDP BRT $4–82M per mile (~2019). Map data: Overture Maps (© OpenStreetMap contributors; land cover ESA WorldCover, CC BY 4.0); USGS 3DEP.

Trip
Hellertown → Downtown
A bus
24
B light rail
16
C tunnel
8
D metro
8
X gondola
—
Trip
Goodman → University Center
A bus
14
B light rail
—
C tunnel
—
D metro
—
X gondola
12
Trip
Mountaintop / Iacocca Hall → University Center
A bus
6.2
B light rail
—
C tunnel
—
D metro
—
X gondola
6.0
Trip
Downtown → North Bethlehem
A bus
5.7
B light rail
5.3
C tunnel
5.3
D metro
3.1
X gondola
—

In-vehicle minutes from a kinematic model; excludes waiting, transfers and vertical access (deep stations in C and D add several minutes). A and X use the Phase 1 network; B–D are from the earlier screening.
Trip	A bus	B light rail	C tunnel	D metro	X gondola
Hellertown → Downtown	24	16	8	8	—
Goodman → University Center	14	—	—	—	12
Mountaintop / Iacocca Hall → University Center	6.2	—	—	—	6.0
Downtown → North Bethlehem	5.7	5.3	5.3	3.1	—

Which mode fits which corridor

✔✔ practical near-term · ✔ practical with conditions · ○ long-term or conditional · ✖ not practical or not proposed. Grades are the steepest 100 m on the routed street path (USGS 3DEP).

Corridor
South approach
Measured
I-78 P&R–Hellertown–Goodman · 4.3 km · max 4.3%
Electric BRT
✔✔ near-term
Gondola
✖ no terrain need
Surface light rail
○ via valley, long-term
Tunnel / subway
✖
Corridor
Mountain link
Measured
Goodman – Mountaintop / Iacocca Hall – Asa Packer · bus 7.2 km, max 13.2% · gondola 3.4 km
Electric BRT
✔ works today (Lehigh shuttles); winter & energy risk
Gondola
✔✔ best terrain fit; studies needed
Surface light rail
✖ grades too steep
Tunnel / subway
✖ for the Mountaintop / Iacocca Hall stop · ○ Goodman–Farrington bypass
Corridor
Campus & Southside core
Measured
UC–Farrington–Third St · 1.5 km
Electric BRT
✔✔
Gondola
✖ short; walk or lift link instead
Surface light rail
○ street running
Tunnel / subway
✖
Corridor
River crossing & Downtown
Measured
Farrington–Fahy Bridge–Walnut & New · 1.8 km
Electric BRT
✔✔ bus lanes need traffic data
Gondola
✖ not proposed
Surface light rail
○ bridge rating, wires in heritage area
Tunnel / subway
○ deep station (26–30 m) in historic core
Corridor
North
Measured
Downtown–Moravian–Linden & Elizabeth · 2.3 km (+5.6 km expansion)
Electric BRT
✔✔
Gondola
✖
Surface light rail
○ long-term
Tunnel / subway
✖
Corridor
Valley corridor
Measured
P&R–Rt 412–Wind Creek–Third St–Farrington · 5.2 km · max 6.5%
Electric BRT
✔ Valley Express
Gondola
✖
Surface light rail
○→✔ best rail candidate
Tunnel / subway
○ long-term
Corridor
St. Luke's branch
Measured
Farrington or Downtown–Fountain Hill · 1.7–2.3 km · ~10%
Electric BRT
✔ bus branch
Gondola
✖
Surface light rail
✖ ~10% grades
Tunnel / subway
✖

Corridor	Measured	Electric BRT	Gondola	Surface light rail	Tunnel / subway
South approach	I-78 P&R–Hellertown–Goodman · 4.3 km · max 4.3%	✔✔ near-term	✖ no terrain need	○ via valley, long-term	✖
Mountain link	Goodman – Mountaintop / Iacocca Hall – Asa Packer · bus 7.2 km, max 13.2% · gondola 3.4 km	✔ works today (Lehigh shuttles); winter & energy risk	✔✔ best terrain fit; studies needed	✖ grades too steep	✖ for the Mountaintop / Iacocca Hall stop · ○ Goodman–Farrington bypass
Campus & Southside core	UC–Farrington–Third St · 1.5 km	✔✔	✖ short; walk or lift link instead	○ street running	✖
River crossing & Downtown	Farrington–Fahy Bridge–Walnut & New · 1.8 km	✔✔ bus lanes need traffic data	✖ not proposed	○ bridge rating, wires in heritage area	○ deep station (26–30 m) in historic core
North	Downtown–Moravian–Linden & Elizabeth · 2.3 km (+5.6 km expansion)	✔✔	✖	○ long-term	✖
Valley corridor	P&R–Rt 412–Wind Creek–Third St–Farrington · 5.2 km · max 6.5%	✔ Valley Express	✖	○→✔ best rail candidate	○ long-term
St. Luke's branch	Farrington or Downtown–Fountain Hill · 1.7–2.3 km · ~10%	✔ bus branch	✖	✖ ~10% grades	✖

An electric subway remains part of the long-term vision but is the least practical option for Bethlehem's size and geology today. Steel-wheel rail cannot climb the mountain grades, and a South Mountain tunnel could not stop at Mountaintop.

The mountain link: bus vs. gondola, side by side

Criterion
Goodman → University Center
Electric bus on mountain roads
~14 min in-vehicle; every 10 min
Gondola (monocable detachable, 8–10 people per cabin)
~12 min; continuous, a cabin every ~10–15 s
Criterion
Capacity
Electric bus on mountain roads
~500–740 people per hour per direction at 10-min headways (40-ft / 60-ft buses)
Gondola (monocable detachable, 8–10 people per cabin)
2,000–3,000 per hour per direction planning range; 3,600 at Awana SkyWay; Leitner advertises up to 4,500
Criterion
Accessibility
Electric bus on mountain roads
Level boarding at platforms; ramps
Gondola (monocable detachable, 8–10 people per cabin)
Level boarding; cabins creep (~0.25 m/s) or stop fully for wheelchairs, strollers and bikes; station lifts if raised. ADA application to be confirmed
Criterion
Weather
Electric bus on mountain roads
Snow and ice on 11–13% grades; chains or closures
Gondola (monocable detachable, 8–10 people per cabin)
Wind holds at ~50–65 km/h crosswind (monocable); lightning holds; bus backup needed. No South Mountain wind data yet
Criterion
Station locations
Electric bus on mountain roads
Flexible curbside stops anywhere on the route
Gondola (monocable detachable, 8–10 people per cabin)
Three fixed stations on straight lines; illustrative sites next to Stabler Arena, Iacocca Hall and the University Center
Criterion
Capital
Electric bus on mountain roads
Low (stops, chargers, vehicles)
Gondola (monocable detachable, 8–10 people per cabin)
~$0.05–0.35B (low confidence). Precedents, not like-for-like: Toulouse Téléo (3S) €82M, ~3 km, 2022; Portland Aerial Tram $57M, ~1 km, 2006; Brest €19M, 420 m, 2016
Criterion
Operations
Electric bus on mountain roads
Part of Phase 1 BRT operating cost; drivers needed
Gondola (monocable detachable, 8–10 people per cabin)
Precedents: Portland ~$0.9–1.7M/yr (year unverified); San Francisco's Laguna Honda study ~$2M/yr and not recommended (2026)
Criterion
Environment & neighbors
Electric bus on mountain roads
No new structures
Gondola (monocable detachable, 8–10 people per cabin)
~12 towers up to ~45 m (illustrative) over forest and campus; privacy and Forest Park / Lost Forest impacts to assess
Criterion
Safety & regulation
Electric bus on mountain roads
Standard bus practice
Gondola (monocable detachable, 8–10 people per cabin)
ANSI B77.1. Pennsylvania's tramway rules (34 Pa. Code Ch. 7, Subch. M) are scoped to recreation — the regulatory path for urban transit is unresolved; an evacuation plan is required
Criterion
Resilience
Electric bus on mountain roads
Shares roads with traffic and winter conditions
Gondola (monocable detachable, 8–10 people per cabin)
Independent of roads, traffic and ice

Criterion	Electric bus on mountain roads	Gondola (monocable detachable, 8–10 people per cabin)
Goodman → University Center	~14 min in-vehicle; every 10 min	~12 min; continuous, a cabin every ~10–15 s
Capacity	~500–740 people per hour per direction at 10-min headways (40-ft / 60-ft buses)	2,000–3,000 per hour per direction planning range; 3,600 at Awana SkyWay; Leitner advertises up to 4,500
Accessibility	Level boarding at platforms; ramps	Level boarding; cabins creep (~0.25 m/s) or stop fully for wheelchairs, strollers and bikes; station lifts if raised. ADA application to be confirmed
Weather	Snow and ice on 11–13% grades; chains or closures	Wind holds at ~50–65 km/h crosswind (monocable); lightning holds; bus backup needed. No South Mountain wind data yet
Station locations	Flexible curbside stops anywhere on the route	Three fixed stations on straight lines; illustrative sites next to Stabler Arena, Iacocca Hall and the University Center
Capital	Low (stops, chargers, vehicles)	~$0.05–0.35B (low confidence). Precedents, not like-for-like: Toulouse Téléo (3S) €82M, ~3 km, 2022; Portland Aerial Tram $57M, ~1 km, 2006; Brest €19M, 420 m, 2016
Operations	Part of Phase 1 BRT operating cost; drivers needed	Precedents: Portland ~$0.9–1.7M/yr (year unverified); San Francisco's Laguna Honda study ~$2M/yr and not recommended (2026)
Environment & neighbors	No new structures	~12 towers up to ~45 m (illustrative) over forest and campus; privacy and Forest Park / Lost Forest impacts to assess
Safety & regulation	Standard bus practice	ANSI B77.1. Pennsylvania's tramway rules (34 Pa. Code Ch. 7, Subch. M) are scoped to recreation — the regulatory path for urban transit is unresolved; an evacuation plan is required
Resilience	Shares roads with traffic and winter conditions	Independent of roads, traffic and ice

Verdict for study

The gondola is the strongest candidate for the mountain link if wind availability, the regulatory pathway, Lehigh land and forest impacts, evacuation and funding check out. Phase 1 does not depend on it — buses would serve the Mountaintop / Iacocca Hall stop from day one. As a Phase 1 option: only with a sponsor, land and a written regulatory path by about 2027; otherwise after 2030, if at all.

Illustrative tower layout from a clearance check on USGS terrain (rope ≥26 m over forest, ≥12 m over open ground, ≥8 m over roofs; spans ≤400 m; towers ≤45 m). Wind studies, survey and manufacturer design would change it.

Sources: Leitner product data; Awana SkyWay; POMA (Medellín Line K); TU Wien wind study; ANSI B77.1; NY Code Rule 32; 34 Pa. Code Ch. 7 Subch. M; Portland Aerial Tram; SFCTA Laguna Honda study (2026-07-28). Retrieved 17 Oct 2026.

Mode quick reference

Benchmarks, not designs.

Electric BRT

40-ft ≈83 / 60-ft ≈123 riders per bus · ~500–740 per hour per direction at 10 min, far more at 2–3 min · ITDP US BRT $4–82M per mile.

Gondola (MDG)

8–10-person cabins · 2,000–3,000 per hour per direction planning · 6 m/s · straight sections between stations · Medellín Line K climbs 400 m in 2.1 km.

Surface light rail

2–4-car trains · 60–90 m platforms · steepest precedents ~9–10% · ~$73M/km at grade (Eno, 2020) · overhead wires.

Mixed tunnel

Metro grades ≤3.5–4% · fire-safety egress, ventilation and cross passages · ~$354M/km underground (Eno, 2020) · deep stations add minutes.

Automated metro

Compact station boxes ~60–65 × 20 m, 18–25 m deep (Copenhagen) · highest capacity and cost · justified only at far higher demand than Bethlehem's today.